Lily Bloom (Lively) has a complicated past, but she's always known what kind of life she wants. While living in Boston, she meets neurosurgeon Ryle Kincaid (Baldoni) and believes she may have found her soulmate. But questions about their relationship soon arise. Things get even more complicated when her "old" high school crush, Atlas Corrigan (Brandon Sklenar), shows up, putting her relationship with Ryle in jeopardy.