Jennifer Garner, Nick Robinson, Katherine Langford, Josh Duhamel
Simon Spier, a high school senior, leads and has led what he considers a perfectly normal life. He has a loving family, parents Emily and Jack Spier, and his younger sister Nora Spier. He has a close group of friends, Leah, Nick and Abby, the former two who he's known almost all his life. Leah just transferred to their school, Creekwood High, this year, but they feel like they've known each other a long time. But there is a "but" in Simon's life, the big secret that he's been keeping now for a few years: he's gay and in the closet to everyone. He knows especially his parents would be all right with his homosexual orientation, despite Jack's often politically incorrect jokes, and that most of the students accept Ethan, their one and only openly gay classmate, but Simon has failed to come out for various reasons, mostly having to do with the change that would occur in what he has known as his life. He discovers that he is not alone: another classmate calling himself "Blue" (a pseudonym) is posting online about his own gay struggles in the closet. With that posting having an email address where one can respond, Simon begins an anonymous correspondence with Blue opening up about his own struggles. In the support they end up providing each other, Simon begins to fall for Blue not even knowing who he is. As Simon tries to figure out who Blue is, he starts to see his classmates in a new light. But circumstances lead to Simon manipulating his friends' love lives, all in an effort to maintain his secret.