Unicorn shifter Keke LaFleur is known around Nocturne Falls as the 'love 'em and leave 'em' gal. She's been running from relationships since her childhood sweetheart accidentally witnessed her transformation. Just when she believes her hooves are planted in the present, her past rides in on a sleek vintage Bronco—of a vehicular kind—pulling an oversize Mobile Vet trailer behind it.

Traveling veterinarian Rochester "Rock" Winthorpe has spent over a decade in search of his first love. He hopes to finally straighten out the misunderstanding that had sent Keke off in a huff. Now that he's found her, he's hell-bent on chasing her until he gets an "I do"—before she manages to gallop away with his heart again.