Businessman Victor Brazhnik and his beautiful young wife Margarita returned to the city after a long absence. They showed up for a reception in honor of Valentine's Day, the woman came out for a minute and... disappeared without a trace. And two days later they discovered the body of the murdered Margarita: her hair was cut off and the sign of the Trinity was drawn on her cheek with a red felt-tip pen... And this is not the first such murder! The city is terrified, especially since residents here and there began to meet an ominous black monk. And only Oleg Monakhov, who calls himself a sorcerer and psychic, can reveal all the secrets!