Safe Haven (2013)

Erin Tierney (Julianne Hough) leaves her abusive, alcoholic husband, Boston police detective Kevin Tierney (David Lyons), under disguise with the assistance of an elderly neighbor, Mrs. Feldman. She eventually flees to the small town of Southport, North Carolina, where she befriends her neighbor, Jo (Cobie Smulders), and adopts the identity of "Katie". She also meets Alex Wheatley (Josh Duhamel), the manager of a local convenience store, and his children, Lexie and Josh. Alex's wife died of cancer, and he keeps letters written by her to be given to their children at important moments of their lives.
With Jo's encouragement, Katie and Alex begin a romantic relationship. Lexie immediately accepts Katie, while Josh is initially resistant, believing Katie to be his mother's replacement, but eventually accepts her as well. Meanwhile, Kevin continues to search for Katie using his authority as a police officer, and forges reports that she is a wanted murderer. Upon seeing her picture in the police station, Alex confronts Katie because he is angry and tells her to leave town. He then realizes that he should have given her a chance to explain herself calmly and goes to find her at the ferry dock. She reveals that Kevin has abused her for years and is trying to find her. Alex promises to protect her from her husband no matter what.
Meanwhile, Kevin's precinct captain finds out about the forged wanted poster, and also discovers the water bottle Kevin always carries is actually filled with vodka. He suspends Kevin for misuse of police resources and being intoxicated at work. After breaking into Mrs. Feldman's home and listening to a phone message that Katie had left for her, Kevin discovers where Katie is hiding and he heads to Southport to confront her.
During the Fourth of July fireworks show, Kevin breaks into Alex's convenience store while he and Josh are away and attacks Katie. Katie hides Lexie in her mother's old office and notices Kevin dousing the store with gasoline. In an attempt to stop him from igniting it, she goes out and tells him that she will return home with him. Katie manages to knock Kevin into the water, but sparks from nearby fireworks land near the store and set it on fire. Alex sees the fire from his boat and rushes to the scene, rescuing Lexie, while Katie finds herself in a physical struggle with Kevin. He takes out his gun and prepares to shoot her; a struggle ensues between them and Katie manages to shoot Kevin, killing him.
The next day, Alex retrieves his wife's letters from the remains of his store and gives Katie the one that his wife had written "For Her" - the woman that Alex would fall in love with. Katie is surprised to learn that Alex's wife is Jo, and that she had been interacting with Jo's ghost, who was guiding Katie to be with Alex. After Katie promises to love Alex and his children, Jo's ghost leaves the corporeal realm, and Katie reunites with her new family.

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