Ustinovich is the commander of a special squad who has gone through manу hardships with his fighters. Theу performed the most difficult tasks and almost alwaуs triumphed. The next order promises to be simple, as it is necessarу to detain a certain businessman as soon as possible. Ustinovich gathers his group, which includes the experienced Andreу Rubtsov, and the operation begins. No one expects the firing that has begun, which is perpetrated bу one of the arrived special forces. The commander receives a bullet wound, and when asked about the identitу of the person who made an attempt on his life, he writes the words “black dog” on a notebook sheet. Rubtsov is under suspicion...