After the death of his wife, Kenzaburo and his son Toshi receive an unexpected letter from beyond the grave. Akiko, their wife and mother, asks them to scatter her ashes at the place she loved most as a child – Lake Windermere in England. The two men, along with Toshi’s wife and daughter, travel to England from Tokyo to fulfil her final wish. But the father and son’s fraught relationship threatens to upend their journey.