鳥籠

A young boy escapes from the bus on his way home from a field trip to an orphanage, and is picked up by a clown in the park. His goal is to find his mother. The clown's uncle, who used to be a yakuza, tells the boy that his wife, who gave him a lot of trouble, died after their divorce, and that his only daughter has been taken in by an acquaintance and is living in Tokyo. The boy's search for his mother was fruitless, and when he returned, an unexpected event awaited him.