Resourceful young Hugo Llor works to make a name for himself in 14th-century Barcelona while keeping a vow he made to the Estanyol family.

Hugo Llor, a 12-year-old boy, spends most of his time on the streets. His day is also spent in the shipyards and his dream is to become a shipbuilding craftsman, although his fate is uncertain. Hugo's life is not easy, he is very lonely and his mother is forced to move away from him, but he has the support and protection of a respected old man: Arnau Estanyol.