The launch of the space rocket is scheduled for Wednesday. Final preparations are underway in the shed. Yulia, Borya, and Petya are waiting for Misha. But Misha has lost interest in the project — it's much more fun to play in the sea. And a garage is about to be built on the site of the shed. The only one who can't come to terms with the cancellation of the flight is little Alka. Early in the morning, he climbs into the spaceship and presses the “Start” button.