You have already played previous games from this series and know what to do. If not then diving into this game series on 4th sequence won't be too much of a problem. Because in the event you want to understand the story then it will be about a doll who wants to get out of the castle crammed with a lot of creepy and very horny monsters and creatures. It is very convinient that in the first room she finds the big treasure chest where she gets a sharp and may be evn magical sword to protect herself. Get into the door and the game begins. Is to get thru different rooms and escape or defeat all monsters on your way. If you won't break away them then our leading lady is fucked. Literally fucked - before restarting the degree you will find a large animated picture of it.