Adapted from the New York Times bestselling novels by Robyn Carr, "Sullivan's Crossing" follows the journey of neurosurgeon Maggie Sullivan, whose perfectly planned life is turned upside down after finding herself in unexpected legal troubles. Needing time to reflect, she temporarily leaves her life in Boston and takes refuge in her childhood home of Sullivan's Crossing, a campground in picturesque Nova Scotia that is run by her estranged father

Maggie tries to reconnect with Sully while awaiting news from home. Cal enlists Maggie's help with an injured resident, allowing her to see a new side to him. Sydney convinces Maggie to let loose at karaoke, after which Cal escorts Maggie home only to find a surprise visitor waiting for her.

Sydney attempts to cheer up Maggie after she suffers a setback back at home. Frank and Edna help Sully, with the annual land blessing, but the festivities end early after a camper goes missing. Maggie and Cal work together with the search and rescue team unaware that another life hangs in the balance.

Maggie and Cal work against the clock in a daring medical rescue, and in the process discover a clue to the whereabouts of a missing camper. Maggie learns a little more about Cal's past, while Sully receives disturbing news

Cal unintentionally let's something slip while helping Maggie prepare to face her troubles back in Boston. Cal develops a friendship with elderly resident Roy Gunderson, and Sully inadvertently pushes Maggie even further away while struggling with his own personal demons.

Sully tries to hide how much he's struggling from Frank and Edna while Cal continues to connect with Roy over their shared sense of loss. Roy confides in Cal about his granddaughter Lola's past trauma, and back in Boston Maggie's boyfriend, Andrew, is intent on repairing their relationship and plans a surprise. However, his plans are derailed when Maggie receives a disturbing call

After receiving some unfortunate news, Maggie returns to Sullivan's Crossing with Andrew. Edna and Frank plan a much needed holiday while Maggie attempts to share her love for the Crossing with a reluctant Andrew. After a night out, things take an unexpected turn.

Maggie continues to deal with the fallout of Andrew's visit, and Cal tries to help her deal with her emotional baggage. Sully accompanies Frank to town. After Maggie's medical skills are put to the test with a distressed climber, Cal decides to return the favour.

After a terrible accident leaves a resident of the Crossing gravely injured, Maggie, aided by Cal and Sully, must face her fears as she puts her neurosurgical skills to use in less than desirable circumstances. Witnessing a side to Maggie he's never seen before, brings father and daughter closer together but also causes Sully to reconsider whether life at the Crossing is the right place for Maggie

Maggie returns to Boston prepared to deal with the consequences of her professional actions. But a secret is revealed that causes her to question her life in the city. Returning to Sullivan's Crossing, Maggie is forced to face feelings of disappointment and rejection that ultimately lead her to confront Sully about her painful past and make a difficult choice.