El abuelo invencible a los 10 años

In 1976, nine-time Go champion Ronan Smith meets a pair of immortals and plays a game for one of them. After that single game, 49 years pass in the mortal world, and Ronan is given a magical peach that transforms him into a ten-year-old again. In 2025, Ronan returns home as a child, unsurprisingly facing doubts and numerous obstacles. He proves his identity by solving the Labyrinth Go, saves his wife with the magical peach, and uncovers a deeper family conspiracy.