Jack Malik (Himesh Patel, BBCs Eastenders) is a struggling singer-songwriter in a tiny English seaside town whose dreams of fame are rapidly fading, despite the fierce devotion and support of his childhood best friend, Ellie (Lily James, Mama Mia! Here We Go Again). Then, after a freak bus accident during a mysterious global blackout, Jack wakes up to discover that The Beatles have never existed and he finds himself with a very complicated problem, indeed.
Performing songs by the greatest band in history to a world that has never heard them, and with a little help from his steel-hearted American agent, Debra (Emmy winner Kate McKinnon), Jacks fame explodes. But as his star rises, he risks losing Ellie the one person who always believed in him. With the door between his old life and his new closing, Jack will need to get back to where he once belonged and prove that all you need is love.