Dark Spell is a story about the girl named Zhenya who suffers from being in love with her husband that has left her, so she decides to bring him back. Desperate heroine casts a spell called “Black Wedding”, which is a magical ritual known for its great power and irreversibility. After the ritual, her beloved husband comes back, although his love becomes more like an obsession: he is even ready to kill Zhenya, so as not to give her to anyone. When the maddened husband dies, the spell does not stop: because even death will not part those who were betrothed by the demon of black wedding.

The young family who moved to a new apartment on the outskirts of the city. The nanny hired by them for the newborn daughter quickly gained confidence. However, the older boy, Egor, talks about the frightening behavior of a woman, but his parents do not believe him. The surveillance cameras installed by the father for comfort only confirm everything is in order. Then one day, Egor, returning home, finds no trace of either the nanny or the little sister, and the parents are in a strange trance and do not even remember that they had a daughter. Then Egor, together with his friends, goes in search, during which it turns out that the nanny is an ancient Slavic demon, popularly known as Baba Yaga.

An evil Mermaid falls in love with Marina’s fiancé Roman and aims to keep him away from Marina in her Kingdom of Death under water. The Mermaid is a young woman who drowned a few centuries ago. Marina only has one week to overcome her fear of the dark water, to remain human in the deathly fight with the monsters and not to become one herself.