Kyle, portrayed by Ross Lynch, is navigating the trials of adolescence after his parents’ divorce, which forces him to relocate to a new school. Struggling to adjust, he forms a friendship with a fellow student, Lonnie (Harvey Guillen). An unexpected encounter with a mysterious bearded man at the mall introduces Kyle to a magical phone equipped with an app called “your universe.” This app grants the unusual ability to turn written words into reality.
Curiously, that night, Kyle whimsically scribbles, “My dad and my car arrived from Cali, how crazy,” and wakes up to find his car awaiting him outside. Intrigued by the application's potential, he discusses it with Lonnie and later impulsively desires to join the school choir. However, his singing fails to impress Mr. Moody ([John Michael Higgins]), although a talented girl named Dani (Olivia Holt) takes notice of him.
Returning to the bearded man to clarify a mishap with the app, Kyle learns that anything he writes will permanently alter reality. His life spirals further when he sees his dad, which leads to tension between his parents. Frustrated by his earlier performance, he pens, “I sang and danced like Bruno Mars, I'll go with Dani to the Band Slam,” and the next day astounds everyone at school with his newfound talent.
Following a successful performance, he faces challenges when he fights a school bully, Brian (Markian Tarasiuk), and quickly becomes the hockey team's star player. Along the journey, he enjoys a night of magic on a Ferris wheel with Dani, during which she expresses her desire for one.
However, Kyle's adventures with the app lead to complications. When he writes that his friend Lonnie is an “expert skateboarder,” it sets off a sequence of events culminating in a bad fall for Derek ([Gregg Sulkin]), the hockey team captain. Kyle’s attempts to impress Dani backfire, especially when he unintentionally catches the affections of Charlotte ([Courtney Eaton]), Derek’s girlfriend.
His presence causes jealousy, stirring turmoil in his relationships. Dani feels betrayed when she learns about Kyle’s fling with Charlotte, leading to heartbreak. Kyle's struggles continue as he deals with his insecurities, familial disputes, and the repercussions of his actions stemming from the app's abilities.
As tensions rise during a hockey match that tests Kyle's abilities, he faces injuries and emotional upheaval. Each choice he makes, influenced by the magical app, leads him to question the true value of friendship and love.
In the end, a fateful performance alongside Dani at a big event makes Kyle realize the importance of authenticity over the enchantment of the app, even if it means facing painful consequences. He seeks redemption and strives to reconnect with Dani and restore his friendships, hoping that their shared moments and musical adventures will lead them back to each other.
