Joo Taeju is the top agent of National Intelligence Service. While Taeju was on a mission to guard a very special VIP, the VIP disappeared by a sudden accident and he can understand what animals are saying after his accidental fall NIS Director Min and agent Mansik suspect Taeju who is suddenly acting strangely, but Taeju is on a mission to find the VIP with help of Ali, a military dog... In the middle of downtown, never seen a team play between a man and an animal's start to happen!