Anton Sommer is retired and lives quietly in the countryside. Once a popular Swiss wrestler, Sommer now tinkers with his bottle ships and wants to be left alone. However, Hiro does not respect Sommer's exclusive live. When Hiro's grandmother, the owner of Sommer's apartment, unexpectedly dies, the boy asks Sommer to accompany him to the south of Japan where Hiro intends to attend a school for Sumo wrestlers. Sommer does not intend to fulfill Hiro's wish, concluded with his past. But the little boy is just as stubborn as Sommer; after Hiro threatens him with terminating his lease, the old man fulfills the boy's wish. Sommer leaves Switzerland for the first time in his life, and the two travel to Japan to start developing a strong friendship.
