Masato is a young ramen chef in the city of Takasaki in Japan. After the sudden death of his emotionally distant father, he chances upon a suitcase of memorabilia and a red notebook – filled with musings and old photos – left behind by his Singaporean mother who died when he was just ten years old. Acting on a hunch, he takes off for Singapore with the notebook, hoping to piece together the story of his life, as well as that of his parents.