A young zoologist interrupts his scientific expedition after learning about the sudden death of his father, a major trade figure. From the notes left behind by his father, the young man discovers with horror that he could not bear the betrayal revealed to him by his closest friend and ally, who also turned out to be his wife’s lover.

Alexandr Smirnovas Alexey Shaposhnikov
Yekaterina Vasilyevaas Tamara Ivanovna — mat' Alekseya
Kirill Lavrovas Sukhobokov (dyadya Zhora) - sosluzhivets ottsa Alekseya
Vera Glagolevaas Zina
Marina Yurasovaas vrach-patologoanatom
Yuri Gorobetsas Fedorenko (dyadya Yura) - sosluzhivets ottsa Alekseya
Lyudmila Arininaas Katya (totya Mukha)
Aleksei Mironovas Pavel Maksimovich
Vladimir Eryominas Tolik - sotrudnik yuridicheskoy konsul'tatsii
Ivan Bagaev