The series centres around the investigations of Police Lieutenant Sławomir Borewicz. Each episode features a different case being solved by Borewicz.

A mysterious Mania appears in Warsaw. The girl, together with the other children, experiences amazing adventures.

A simple governess and a wealthy aristocrat fall madly in love with each other. However, his family are prejudiced towards her and have other plans for him.

Wiktor Wiarecki is an unsuccessful writer. He is also not successful in his personal life: Wiktor's marriage is in crisis, and his adult son wants nothing to do with his father. The turning point is the death of his friend Wiarecki, an outstanding writer Stefan Przewłocki. A literary widow gives Wiktor the materials for the deceased's last novel.

Soon after the end of the war, a former officer moves to a small seaside town in the Recovered Lands. The situation in this post-German territory is still unsettled.