A young boy and his family set off on a sailing trip of a lifetime until a violent storm erupts, sweeping Michael and his dog overboard. After washing up on a remote island, terrified, they struggle to survive and adjust to life alone, One day, Michael discovers he is not alone when he is confronted by a mysterious Japanese man who has lived there secretly since World War II, angry that Michael has arrived. However, as dangerous invaders threaten their fragile island paradise, Michael and the old man, Kensuke, join forces to save their secret world.
- Genre: Adventure, Animation, Drama, Family
- Studio: Lupus Films, Jigsaw Films, Spirit Base, BFI, Brennus Productions, Film Fund Luxembourg, Ffilm Cymru Wales, Melusine Productions, Align, Bumpybox, Le Pacte, Bankside Films
- Keyword: based on novel or book, world war ii, pacifism, orphan, based on children's book, unlikely friendship, japanese soldier, shipwrecked, 1940s, nagasaki, animated adaptation
- Cast: Sally Hawkins, Cillian Murphy, Raffey Cassidy, Aaron MacGregor, Ken Watanabe, Alfred Kodai Berglund
