Mika Arlington was supposed to spend the summer after her junior year shadowing her marine biologist parents at the Monterey Bay Aquarium, but when her estranged grandmother randomly shows up on the doorstep one day, those plans are derailed. Because Grandma Betty isn't here to play nice—she is cranky, intolerant of Mika's mixed-race-couple parents, and oh yeah she has Alzheimer's and is out of money. While Mika's family would rather not deal with Grandma Betty, they don't have much choice. And despite Mika's protests, she is roped into caring for a person that seems impossible to have compassion for. And if that wasn't hard enough, Mika must train the new guy at her pet shop job who wants to be anywhere else, and help a friend through her own family crisis. Something's gotta a give, but whichever ball Mika drops means losing someone she loves. Not exactly a recipe for Best Summer Ever—or is it?