A real monster from urban legends, nicknamed the daughter of Lolita, has settled in an abandoned mental hospital. This is the supposedly unborn daughter of an offended woman who takes revenge on everyone who disturbed her peace. One of the victims turns out to be a relative of a colleague of Krestonosev, so the special department for the investigation of occult affairs immediately joins the work. Meanwhile, the department's staff is beginning to suspect that Konstantin Krestonostsev is Faust...

A group of friends and business colleagues were relaxing on the shore of the lake, when suddenly one of them was dragged into the water by Mavka. The comrades are convinced that it was their colleague who drowned two weeks ago. Krestonostsev considers this fiction, but Morozov, on the contrary, as always, is convinced of the opposite. He even finds a like-minded professor who involves him in an experiment to revive a drowned man...