Stas and Peter, two young psychiatry students and friends perceive life differently. Stas desires to act by the rules, Peter prefers experimenting. Stas is a hard worker while Peter likes to break the silence. Stas loves with hate, Peter hates with love. Stas is a diligent student, Peter is a troublemaker. It's a pity they both have one passion - Katherina. Stas' loving stepmother, father's wife, a tourist guide. For Peter - a lover. Will their friendship stand the test of passion for the woman? This is an intriguing story about an unusual love triangle and that madness is closer than it seems.