The film adaptation of the popular stage musical "Dear Evan Hansen" centers on a high school student named Evan who fabricates a friendship with a deceased classmate to comfort the boy's mother. This initial deception quickly spirals, drawing Evan deeper into a complex web of falsehoods.

The narrative follows Evan as he navigates the consequences of his lies. The story, originating from a Broadway musical, delves into themes of grief, social anxiety, and the impact of manufactured connections in the digital age. The film explores how Evan's attempts to console a grieving mother by creating a narrative of a friendship that never existed lead to escalating complications.

"Dear Evan Hansen" first premiered on Broadway in 2016 and has since gained international recognition. The stage production won multiple Tony Awards, including Best Musical. The film adaptation brings the story to a new medium, aiming to capture the emotional core of the original production.