Ace soldier Jeong Jino is assigned a top-secret mission to save the world - only to find out it involves becoming a magical middle-aged man. Things go from bad to worse when the transformation makes his fellow soldiers suddenly claim he smells amazing and start chasing after him. Just as Jino is about to lose his mind, a - ahem - "helping hand" arrives in the form of Eliah, his longtime rival and the army’s other ace. Saving the world was never supposed to be this embarrassing…or this complicated.