The Pledge follows Charles and Sam, two lifelong friends, on their last day of pledgeship. Charles is worried about what is in store but Sam reassures Charles that everything will be okay. In the night Charles spots a girl he has a crush on and walks up to her. Everything is going well until Randy, one of the frat leaders, pulls Charles for a chat. Randy drags Charles to an empty garage where Sam and Nick, another frat leader, await them. The frat leaders force the pledges to take acid which sends Charles into a spiral. Charles starts running through the frat house trying to find a place to be alone but what he finds indicates something more sinister might be in store for him.