Psychologist Anastasia and Viktor, the head of the spaceport, are conducting an experiment to find out if the team can handle a two-year mission to Mars. The experienced cosmonaut Kovalev, his ex-wife and medical assistant Natalia, biologist Oksana, flight engineer Platon, and Chinese cosmonaut Wei have no idea that they will spend two years not in space, but in a pavilion. Everything goes according to plan until Mitroch accidentally arrives at the spaceport.