Why Did This Happen? is about two young people who fall in love. Mark follows the teachings of the Watch Tower Society, while Lisa was raised in the Baptist Church. Mark's goal is to pull Lisa away from her faith so that he can marry her. Their relationship causes many concerns for both of their parents. Mark's parents are devout Jehovah's Witnesses, and Lisa's parents are deacons in a Baptist church. Mark has to make a decision that will not only affect his life but his family's as well. Troubled by a situation that arises, Mark begins questioning God, "Why did this happen?"