Three school time friends Julia, Diana and Estela, meets at Julia's wedding evening. Friendship at stake, because all of them are in love with Julia's future husband Paulius.

Black Cats tells the story of three school time friends Julia, Diana and Estela, who meets at Julia's wedding evening. Friendship at stake, because all of them are in love with Julia's future husband Paulius, and had a relationship with him and different plans. It is becoming clear that he is a deceiver and has a lot of secrets. One of the secrets is a disappearance of an expensive diamond. But everything changes when Paulius dies and his twin brother suddenly appears.