Mallory Vaughn is at a crossroads in her life. A year after learning that Big Mac McCarthy is her father, she's spending more and more time on Gansett Island, surrounded by the large and boisterous McCarthy family. When she's laid off from her longtime job, she goes to visit her family on Gansett and tries to figure out her next chapter. Soon, an unexpected job offer has her packing up her home in Providence to move to the island for at least the summer, if not longer. She decides to make this the "Summer of Mallory," full of new adventures, new people, and new opportunities. Will a new love also be part of the Summer of Mallory? Anything is possible on Gansett Island, especially true love!