Priscilla, Devon, and Bailey haven't been close in years, but when the sisters are forced to come together to settle their mother's estate, they discover a secret. In an old trunk, they happen upon ownership papers for a house on the Amalfi Coast, along with a love letter to their mother from an anonymous man, promising to meet her in Italy during the summer of her 65th birthday. The sisters embark on a trip to the stunning cliffside village of Positano, Italy, to track down the mysterious ex-lover, and figure out who their mother really was.