Abby Day is a quirky photographer who is going through it. Her grades are slipping, she’s one paper away from failing her English class, and her Grandpa passed away a year ago. The only thing getting her through are her two best friends: Leo and Connie. Except things are awkward with Leo because of a Big Embarrassing Incident that both are avoiding discussing. Everything starts to change for Abby the day she accidentally learns of a big sister she never knew existed….and decides to go to summer camp to unravel her family's secrets with long lost big sis Savannah Tully.