So long as there is Mercy introduces Spe as the protagonist, searching for her younger brother. After their mother's death, the children were left with their father, who married another woman. Soon he also became very ill, leaving all his property to his daughter and son Mercy. This greatly angered the stepmother, who locked them in different parts of the dollhouse. Traveling through its corridors, the heroine will meet many ghosts of children, also sealed in this place. After such encounters, the main character will be able to use the special abilities of these creatures to solve the puzzles encountered. Gradually moving through the rooms, Spe will try to find her brother and get out in order to escape from the clutches of the witch stepmother who poisoned their father.

SlatiM invites the gamer to take part in this dangerous and dark adventure of a courageous girl. Together they will have to find a way through many mysterious rooms locked with cunning mechanisms. The house is like a labyrinth inside, so the help of local ghosts will often be the only way out. For example, one of them, named Lucien, can control fire and will help illuminate the rooms with the warm light of candles. Once having met one of the ghostly children, the main character can take them with him, using skills when necessary. Only the timely use of the right skill in the right place in the room will allow you to overcome all obstacles on the way to your younger brother and the desired freedom.