Three bestfriends Ariana, Callie, and Brandon, make a summer to-do list every year with crazy dares and challenges for them to complete throughout the summer. They look forward to breaking boundaries and rules and making memories each summer through the list. Ariana is the only one in the group to have completed every to-do on the list each year and she doesn't intend to break her winning streak anytime soon. But what is she gonna do when number 7 on the list seems practically impossible for her to complete.