Simon Spier is a shy, funny teenager with a loving family and some great friends. However, he has a secret that none of them know about. The only person he’s comfortable sharing this secret with is Blue, an online friend he has been exchanging emails with for the past few months. When someone comes across these emails and threatens to leak them by blackmailing Simon, he worries about two things; one- not being able to come out on his terms and two-losing Blue; because he’s somebody Simon has come to deeply fall in love with.