Gyeon Heeseong, a dog shifter abandoned by his pack, is forced into running drugs. After a job goes wrong, he reverts to his true form—a tiny white puppy—and is taken in by Yoon Chi-young, a ruthless enforcer who thinks he's just a stray. Now trapped in a life of unexpected affection, Heeseong must choose between escaping his past or staying leashed to Chi-young's overwhelming love.