The Best Driver on the road to Metamorphosis. Despite her age, BOŽENA is the best tram driver in the city. But when she has to drive a modern tram, she loses her nerve and is fired. Božena refuses to give up and tries to find a new direction in her life. But she has to hurry, her body is aging and turning into a fragile BUG. The hope for Bozena is her granddaughter, who is growing as fast as Bozena is shrinking.