Lui, a struggling author with a heart condition, and his wife Elle, a retired psychiatrist, find their idyllic life shattered when Elle begins to succumb to the effects of dementia.

Kid, a 15-year-old hard laborer, steals a map that promises to reveal the location of the notorious pirate Black Mor's treasure. Together with his crew -- MacGregor, Beanpole, Taka and Jim the monkey -- Kid procures a vessel and sets out to sea.