When her introverted mathematician father announces he's getting remarried, Chelsea is forced to acknowledge that her life stopped after her mother died, and that the last time she can remember being happy, in love, or enjoying her life was on her gap year. Inspired to retrace her steps - to find Colin in Ireland, Jean Claude in France, and Marcelino in Italy - Chelsea hopes that one of these three men who stole her heart so many years ago, can help her find it again.