diff --git a/engines/prince/hero.cpp b/engines/prince/hero.cpp
index 2f984c18147..51ba4529fe6 100644
--- a/engines/prince/hero.cpp
+++ b/engines/prince/hero.cpp
@@ -208,7 +208,7 @@ void Hero::countDrawPosition() {
 	tempMiddleX = _middleX - width; //eax
 	int z = _middleY; //ebp
 	int y = _middleY - _scaledFrameYSize; //ecx
-	_vm->checkNak(tempMiddleX, y, _scaledFrameXSize, _scaledFrameYSize, z);
+	_vm->checkMasks(tempMiddleX, y, _scaledFrameXSize, _scaledFrameYSize, z);
 
 	if (_zoomFactor != 0) {
 		//notfullSize
diff --git a/engines/prince/prince.cpp b/engines/prince/prince.cpp
index beaa997184e..36f0ea7bc8f 100644
--- a/engines/prince/prince.cpp
+++ b/engines/prince/prince.cpp
@@ -299,29 +299,32 @@ bool PrinceEngine::loadLocation(uint16 locationNr) {
 	loadZoom(_mainHero->_zoomBitmap, _mainHero->kZoomBitmapLen, "zoom");
 	loadShadow(_mainHero->_shadowBitmap, _mainHero->kShadowBitmapSize, "shadow", "shadow2");
 
-	_picWindowX = 0;
-
 	_mobList.clear();
 	Resource::loadResource(_mobList, "mob.lst", false);
 
+	_animList.clear();
+	Resource::loadResource(_animList, "anim.lst", false);
+
 	for (uint32 i = 0; i < _objList.size(); i++) {
 		delete _objList[i];
 	}
 	_objList.clear();
 	Resource::loadResource(_objList, "obj.lst", false);
 
-	_animList.clear();
-	Resource::loadResource(_animList, "anim.lst", false);
+	_room->loadRoom(_script->getRoomOffset(_locationNr));
+
+	for (uint i = 0; i < _maskList.size(); i++) {
+		free(_maskList[i]._data);
+	}
+	_maskList.clear();
+	_script->loadAllMasks(_maskList, _room->_nak);
+
+	_picWindowX = 0;
 
 	_mainHero->_lightX = _script->getLightX(_locationNr);
 	_mainHero->_lightY = _script->getLightY(_locationNr);
 	_mainHero->setShadowScale(_script->getShadowScale(_locationNr));
 
-	_room->loadRoom(_script->getRoomOffset(_locationNr));
-
-	_overlayList.clear();
-	_script->loadOverlays(_overlayList, _room->_nak);
-
 	clearBackAnimList();
 	_script->installBackAnims(_backAnimList, _room->_backAnim);
 
@@ -746,18 +749,19 @@ bool PrinceEngine::spriteCheck(Graphics::Surface *backAnimSurface, int destX, in
 	return true;
 }
 
-void PrinceEngine::checkNak(int x1, int y1, int sprWidth, int sprHeight, int z) {
+// CheckNak
+void PrinceEngine::checkMasks(int x1, int y1, int sprWidth, int sprHeight, int z) {
 	int x2 = x1 + sprWidth - 1;
 	int y2 = y1 + sprHeight - 1;
 	if (x1 < 0) {
 		x1 = 0;
 	}
-	for (uint i = 0; i < _overlayList.size() ; i++) {
-		if (_overlayList[i]._state != 1 && _overlayList[i]._flags != 1) {
-			if (_overlayList[i]._z > z) {
-				if (_overlayList[i]._x1 <= x2 && _overlayList[i]._x2 >= x1) {
-					if (_overlayList[i]._y1 <= y2 && _overlayList[i]._y2 >= y1) {
-						_overlayList[i]._state = 1;
+	for (uint i = 0; i < _maskList.size() ; i++) {
+		if (_maskList[i]._state != 1 && _maskList[i]._flags != 1) {
+			if (_maskList[i]._z > z) {
+				if (_maskList[i]._x1 <= x2 && _maskList[i]._x2 >= x1) {
+					if (_maskList[i]._y1 <= y2 && _maskList[i]._y2 >= y1) {
+						_maskList[i]._state = 1;
 					}
 				}
 			}
@@ -765,6 +769,22 @@ void PrinceEngine::checkNak(int x1, int y1, int sprWidth, int sprHeight, int z)
 	}
 }
 
+// InsertNakladki
+void PrinceEngine::insertMasks() {
+	for (uint i = 0; i < _maskList.size(); i++) {
+		if (_maskList[i]._state == 1) {
+			showMask(i);
+		}
+	}
+}
+
+// ShowNak
+void PrinceEngine::showMask(int maskNr) {
+	if (_maskList[maskNr]._flags == 0) {
+
+	}
+}
+
 void PrinceEngine::showSprite(Graphics::Surface *backAnimSurface, int destX, int destY) {
 	if (spriteCheck(backAnimSurface, destX, destY)) {
 		destX -= _picWindowX;
diff --git a/engines/prince/prince.h b/engines/prince/prince.h
index 988f468a72d..68a4159be28 100644
--- a/engines/prince/prince.h
+++ b/engines/prince/prince.h
@@ -85,7 +85,7 @@ struct AnimListItem {
 	int16 _y;
 	uint16 _loopType;
 	uint16 _nextAnim; // number of animation to do for loop = 3
-	uint16 _flags; // byte 0 - draw overlays, byte 1 - draw in front of overlay, byte 2 - load but turn off drawing
+	uint16 _flags; // byte 0 - draw masks, byte 1 - draw in front of mask, byte 2 - load but turn off drawing
 	bool loadFromStream(Common::SeekableReadStream &stream);
 };
 
@@ -142,15 +142,16 @@ struct BackgroundAnim {
 };
 
 // Nak (PL - Nakladka)
-struct Overlay {
+struct Mask {
 	int16 _state; // visible / invisible
-	int16 _flags; // turning on / turning off of an overlay
+	int16 _flags; // turning on / turning off of an mask
 	int16 _x1;
 	int16 _y1;
 	int16 _x2;
 	int16 _y2;
 	int16 _z;
 	int16 _number; // number of mask for background recreating
+	byte *_data;
 };
 
 struct DebugChannel {
@@ -221,7 +222,9 @@ public:
 	static const int16 kNormalWidth = 640;
 	static const int16 kNormalHeight = 480;
 
-	void checkNak(int x1, int y1, int sprWidth, int sprHeight, int z);
+	void checkMasks(int x1, int y1, int sprWidth, int sprHeight, int z);
+	void insertMasks();
+	void showMask(int maskNr);
 
 	int testAnimNr;
 	int testAnimFrame;
@@ -269,7 +272,7 @@ private:
 	Animation *_zoom;
 	Common::Array<Mob> _mobList;
 	Common::Array<Object *> _objList;
-	Common::Array<Overlay> _overlayList;
+	Common::Array<Mask> _maskList;
 
 	bool _flicLooped;
 	
diff --git a/engines/prince/script.cpp b/engines/prince/script.cpp
index 9798882bbcd..9f2f54a74e4 100644
--- a/engines/prince/script.cpp
+++ b/engines/prince/script.cpp
@@ -291,33 +291,53 @@ void Script::installBackAnims(Common::Array<BackgroundAnim> &backanimList, int o
 	}
 }
 
-void Script::loadOverlays(Common::Array<Overlay> &overlayList, int offset) {
-	Overlay tempOverlay;
+bool Script::loadAllMasks(Common::Array<Mask> &maskList, int offset) {
+	Mask tempMask;
 	while (1) {
-		tempOverlay._state = READ_UINT32(&_data[offset]);
-		if (tempOverlay._state == -1) {
+		tempMask._state = READ_UINT32(&_data[offset]);
+		if (tempMask._state == -1) {
 			break;
 		}
-		debug("tempOverlay._state: %d", tempOverlay._state);
-		tempOverlay._flags = READ_UINT32(&_data[offset + 2]);
-		debug("tempOverlay._flags: %d", tempOverlay._flags);
-		tempOverlay._x1 = READ_UINT32(&_data[offset + 4]);
-		debug("tempOverlay._x1: %d", tempOverlay._x1);
-		tempOverlay._y1 = READ_UINT32(&_data[offset + 6]);
-		debug("tempOverlay._y1: %d", tempOverlay._y1);
-		tempOverlay._x2 = READ_UINT32(&_data[offset + 8]);
-		debug("tempOverlay._x2: %d", tempOverlay._x2);
-		tempOverlay._y2 = READ_UINT32(&_data[offset + 10]);
-		debug("tempOverlay._y2: %d", tempOverlay._y2);
-		tempOverlay._z = READ_UINT32(&_data[offset + 12]);
-		debug("tempOverlay._z: %d", tempOverlay._z);
-		tempOverlay._number = READ_UINT32(&_data[offset + 14]);
-		debug("tempOverlay._number: %d\n", tempOverlay._number);
-		overlayList.push_back(tempOverlay);
-		offset += 16; // size of Overlay (Nak) struct
+		debug("tempMask._state: %d", tempMask._state);
+		tempMask._flags = READ_UINT32(&_data[offset + 2]);
+		debug("tempMask._flags: %d", tempMask._flags);
+		tempMask._x1 = READ_UINT32(&_data[offset + 4]);
+		debug("tempMask._x1: %d", tempMask._x1);
+		tempMask._y1 = READ_UINT32(&_data[offset + 6]);
+		debug("tempMask._y1: %d", tempMask._y1);
+		tempMask._x2 = READ_UINT32(&_data[offset + 8]);
+		debug("tempMask._x2: %d", tempMask._x2);
+		tempMask._y2 = READ_UINT32(&_data[offset + 10]);
+		debug("tempMask._y2: %d", tempMask._y2);
+		tempMask._z = READ_UINT32(&_data[offset + 12]);
+		debug("tempMask._z: %d", tempMask._z);
+		tempMask._number = READ_UINT32(&_data[offset + 14]);
+		debug("tempMask._number: %d\n", tempMask._number);
+
+		const Common::String msStreamName = Common::String::format("MS%02d", tempMask._number);
+		Common::SeekableReadStream *msStream = SearchMan.createReadStreamForMember(msStreamName);
+		if (!msStream) {
+			error("Can't load %s", msStreamName.c_str());
+			delete msStream;
+			return false;
+		}
+		uint32 dataSize = msStream->size();
+		if (dataSize != -1) {
+			tempMask._data = (byte *)malloc(dataSize);
+			if (msStream->read(tempMask._data, dataSize) != dataSize) {
+				free(tempMask._data);
+				delete msStream;
+				return false;
+			}
+			delete msStream;
+		}
+
+		maskList.push_back(tempMask);
+		offset += 16; // size of tempMask (Nak) struct
 	}
-	debug("NAK size: %d", sizeof(Overlay));
-	debug("overlayList size: %d", overlayList.size());
+	debug("Mask size: %d", sizeof(tempMask));
+	debug("maskList size: %d", maskList.size());
+	return true;
 }
 
 InterpreterFlags::InterpreterFlags() {
diff --git a/engines/prince/script.h b/engines/prince/script.h
index d0693ca11f6..4b9f85a61ec 100644
--- a/engines/prince/script.h
+++ b/engines/prince/script.h
@@ -39,7 +39,7 @@ class PrinceEngine;
 class Animation;
 struct Anim;
 struct BackgroundAnim;
-struct Overlay;
+struct Mask;
 
 namespace Detail {
 	template <typename T> T LittleEndianReader(void *data);
@@ -54,7 +54,7 @@ public:
 	int _mobs; // mob flag offset
 	int _backAnim; // offset to array of animation numbers
 	int _obj; // offset to array of object numbers
-	int _nak; // offset to array of overlays
+	int _nak; // offset to array of masks
 	int _itemUse;
 	int _itemGive;
 	int _walkTo; // offset to array of WALKTO events or 0
@@ -135,7 +135,7 @@ public:
 	uint8 *getRoomOffset(int locationNr);
 	void installBackAnims(Common::Array<BackgroundAnim> &_backanimList, int offset);
 	void installSingleBackAnim(Common::Array<BackgroundAnim> &_backanimList, int offset);
-	void loadOverlays(Common::Array<Overlay> &overlayList, int offset);
+	bool loadAllMasks(Common::Array<Mask> &maskList, int offset);
 
 	const char *getString(uint32 offset) {
 		return (const char *)(&_data[offset]);