Motivated by newfound empathy, Hugo decides to scatter Rosemary’s ashes in the sea, accompanied by her dog, Sunny.

Hugo embarks on a journey to find Henry, discovering the elderly man’s loneliness and heartbreak. He shares Rosemary’s story, including the unposted letter and love letters from Henry. Together, they scatter Rosemary’s ashes at her favorite beach. Hugo returns to his life, accompanied by Sunny, and writes songs about his grandma’s lost love, finding success and redemption in his music.

In summary, Hugo’s journey of remorse, discovery, and redemption unfolds as he reflects on his treatment of Rosemary, learns about her past, and seeks forgiveness through scattering her ashes and honoring her lost love with Henry.