A group of friends decide to go to a singer, Shawn Mendes, concert. One friend in the group, Addilynn Tatum, is really into Shawn while the rest decided to go just to have fun. Addilynn who is called Addi, Add, or Lynn by her friends did not expect what was going to happen after an unexpected run-in with Shawn happens before the concert even happens. "I never knew that everything would change just with one ticket" What will happen when they run in to each other? How will her friends react? Will this be her chance to meet Shawn or will this be a disaster?