The life of a man, transitioning from a hunter-gatherer existence in the mountains to a life in the farm. One day, he comes across an ox, which somehow, he succeeds in leading back to his home. He lives with the animal, which becomes his companion in a life of changing seasons.

The film follows the last 4 years life of Grandma Hashima, the last existent from colonial Taiwan, who knows the secrets of "Green Jail," the notorious coal mine before World War II on Iriomote Island, Okinawa, Japan.

In an intimate and exciting journey to the root, the film follows a family based in Okinawa, Japan, that visits Taiwan to rediscover their family origins.

Haunted by the tragic death of his father, Juan Martín Hsu, a young Argentinian filmmaker of Taiwanese origin, returns to Taipei to film the reunion with his mother. Reality and fiction blend in a moving personal quest in which an incredible portrait of a Mother Courage stands out from the picture of a family saga marked by uprooting.

In the 1980s, Taiwanese families arrived in Argentina; years later, many who felt Argentinean ended up in Taiwan. Parents leaving, their children returning; identities and memories divided, worlds we build to find each other.