Junior Lieutenant Maleshkin, an unshooted graduate of the school, commands the crew of the self-propelled gun SU-100. All the subordinates of Maleshkin are older than him and much more experienced. The authority of the young commander is tested at every step, he quarrels, then reconciles with his crew.

A rare astronomical phenomenon — the parade of planets — has a strange effect on several men. The heroes of the film — an astrophysicist, locksmith, salesman, architect, loader, trolley bus driver — are called up for military training, which ends ahead of time. There is a strange pause in their life — no one knows where they are, no one is waiting for them, and they themselves can not rush anywhere. This short respite in a hasty and busy life gives the heroes the opportunity to experience strong and very important feelings for them.