After the tragic death of Harry Styles, his bandmates, Louis Tomlinson, Liam Payne, Niall Horan and Zayn Malik, struggle to recover after the loss of their best friend. One day, after being given permission to go through Harry's apartment, they find a letter, addressed to all five of them. In that letter, Harry writes about the struggle to stay alive, while trying to keep everyone happy. At the end of the letter, Harry leaves them with a series of errands that he needs them to complete, but only after the letters that include their tasks, are delivered to them. Will the troubling tasks be too much for the boys to complete, or will they live out Harry's wishes as he wanted them?