In a small Tokyo apartment, twelve-year-old Akira must care for his younger siblings after their mother leaves them and shows no sign of returning.

In a poor district of Edo lives a young samurai named Soza. He has been sent by his clan to avenge the death of his father. He isn't an accomplished swordsman however, and he prefers sharing the life of the residents, teaching the kids how to write etc. When he finally finds the man he is looking for, he will have to decide whether he follows the way of the samurai or chooses peace and reconciliation.

The making of the movie "Nobody Knows" by award-winning director Hirokazu Kore-eda.