Mackenzie "Mac" Harris fled her hometown of Bluff Point, Maine after being left at the altar and seeking solace in the arms of her best friend's off-limits brother, Gavin. Seven years later, she's back to attend her best friend's wedding, and she figures she's safe now from the mistakes of her youth.

But Gavin, the town's veterinarian, has never forgotten the woman who has always held his heart. And when Mac rescues a stray puppy named Tulip, only Gavin can help. With a little assistance from Tulip, Gavin vows to make Mac realize that their feelings are more than just puppy love....