After the events of Perks of Being A Wallflower (2012), Charlie starts to show affections for his friend, Sam. But when Sam tells Charlie she dosn't like him and that she has moved on with her new boyfriend Max, Charlie starts going out with a girl called Emma, one of Sam's new friends and Sam gets jealous. However, that changes when Charlie receives a deperate phone call from Sam, telling him that she has gotten pregnant, leading Charlie to believe Max is the father. But when they arrive at the hospital, they discover that Charlie is the true father of the baby, leading Sam to let of Max and begin her romantic relationship with Charlie. However, things start to change for Charlie yet again as during their relationship, Charlie sees Sam hitting things off with another guy called Eric and he becomes infuriated, dreading that it would affect their relationship and the life they were about to have.
