A young German girl jumps off a Wroclaw church tower. She is a member of a Women's Gregorian Choir led by a cantor Jan (Adam Woronowicz). The church community is appalled by a taboo breaking women's schola. Among those who strongly disapprove this choir is ...the cantor himself. The mysterious death is investigated by an experienced and uncompromising Superintendent Warski (Bartlomiej Topa), for whom saving human live means more than following the procedures. When he breaks the rules in another action, he is referred to a psychologists ( Malgorzata Foremniak). Hardly any man can resist the sex appeal of this outwardly cold but a beautiful woman... Superintendent Warski is not really happy when he finds out that Ana Wittesch ( Julia Kijowska), a German police officer of a Polish origin, is assigned to the case. He has no idea that Ana came to Wroclaw to conduct other secret investigation. Given an exceptional intelligence and a police instinct, Superintendent Warski quite soon ...