an old man travels with his cat across the usa

The story of three pets, a cat and two dogs, who lose their owners when they are all on vacation. Can they find their way home?

Before the Seavers leave for a family vacation to San Francisco, they drop off their pets -- Chance, an adventurous American bulldog; Shadow, a wise golden retriever; and Sassy, a cautious cat -- at a friend's ranch. But when the animals start to worry that they've been left for good, the three embark together on a treacherous and thrilling journey to find their way back home through the California wilderness.

Satoru is a young man with a warm heart. He has a cat named Nana, but, due to circumstances, he can't raise cat Nana anymore. He travels with Nana to find a person who will take care of Nana. During his travels, he meets various people like his childhood friend and his first love. His unknown past and secret are revealed.

Journey through the night.

A street cat meets an old man that will change his life forever. Between bowls of milk and warm cuddles, he feels welcomed by his new owner, but the elderly gentleman has secrets of his own.