Bug. Girl's portrait hiding a safe box (2nd floor, under the lamp where you get a bulb). You take the portrait open and it won't close back to show the safe box code. The only way to find the code is the hint.
Copied from another haunted house game. Some of the puzzle answers don't make sense (math puzzle answer, safe puzzle answer is found on portrait which can't be found).
Good game but the scheme is copied from escape impossible game.