Ten years before the outbreak of the Second World War in Asia, a Japanese Go master and his Chinese rival meet in China to play a game of Go (loosely described as an Asian version of chess). It soon becomes evident that the Chinese master's son is the most talented player that the Japanese master has ever encountered, and he convinces the boy's father to let him bring the child back to Japan to train him as a professional Go player. Years pass, and as the young Chinese master grows to maturity in Japan, the Japanese invasion of China forces him to choose between his triumphant career and his loyalty to his native country. His decision is complicated by his marriage to the daughter of the Japanese master, with whom he has produced a child. His choice will profoundly alter the lives of two families. Their saga serves as a reflection of the tragic relations between their two great countries, and the possibility of reconciliation and healing.

It is the late 1920s when six-year-old Yingzi and her family move to Beijing. As Yingzi explores the busy streets and alleys, she befriends a widow who, driven mad by grief, stands vigil at the entrance of her hutong, waiting for her missing daughter to return.

When Sosuke, a young boy who lives on a clifftop overlooking the sea, rescues a stranded goldfish named Ponyo, he discovers more than he bargained for. Ponyo is a curious, energetic young creature who yearns to be human, but even as she causes chaos around the house, her father, a powerful sorcerer, schemes to return Ponyo to the sea.