When Ashly's 16 year-old cousin, Izzy, is left at Ashly's for the summer, Ashly finds she is not quite as hip as she thought.
Ashly tries to make peace with her bird stalker, Gerald. Meanwhile Izzy tries to hide her budding crush on Diego.
Izzy gets her period early which doesn't bode well for her lifeguard training class with Diego. Ashly and Avery continue to flirt, much to Ashly's delight.
When Ashly finds out she has high blood pressure, Izzy and Ashly go on a quest to get healthy.
It's Ashly's turn to host book club and everything is absolutely perfect... except she forgot to actually read the book. Izzy and Avery help Ashly through her impending disaster leaving Ashly and Avery on an accidental date.
Ashly & Izzy both go on first dates which don't quite go according to plan because of the faulty advice Izzy finds on DeezMoves.gov.
Ashly & Izzy get stranded in a mall parking lot and must accomplish all their unfulfilled dreams to find their car.
It's Izzy's last day and Ashly is trying to make everything perfect with a road trip to the beach, but unfortunatly for Ashly nothing is going according to plan.