Ellie O'Brien (List) is trying to juggle rhythmic gymnastics and troubles with her best friend. Meanwhile, classmate Jack Malloy (Bertrand) is struggling to live up to his brothers' hockey-star legacies and his dad's high expectations and tough-love approach. When a text argument about whose life is easier gets out of hand, Ellie and Jack trigger an explainable real-life swap. As each tries to navigate the other's life, hilarity ensues when Ellie (as Jack) learns about brotherly bonding and hockey lingo, while Jack (as Ellie) has to decipher girl code and experiences a spa day. With a rhythmic gymnastics championship and a spot on the varsity hockey team on the line, they must figure out how to get back in their own bodies before the swap becomes permanent. As they are forced to literally walk in each other's shoes, they gain empathy for one another and learn valuable lessons about their own lives.

Molly Mahoney is the manager of Mr. Magorium's Wonder Emporium, the awesome toy store owned by Mr. Edward Magorium. Molly was a promising composer and piano player when she was a girl, and now she is a twenty-three year-old insecure woman that feels stuck in her job. Among the costumers of the Emporium is the lonely hat collector, Eric Applebaum, who has only Molly and Mr. Magorium for friends. When the last pair of shoes that Mr. Magorium bought in Toscana is worn, he hires the accountant, Henry Weston to adjust the accounts of the Emporium. Furthermore, he claims that he is two hundred and forty-three years old and his time to go has come; he gives a block of wood called Congreve cube to Molly and asks Henry to transfer the Emporium to her name. Molly tries to convince Mr. Magorium to stay in his magical toy store instead of "going".