In the cutthroat world of the Seoul underworld, the Stray pack is the apex predator-until a phantom begins dismantling their empire. A silent assassin is executing their targets with feral precision, leaving nothing but a lingering, untraceable scent. When the pack finally corners the "ghost," they expect a rival Alpha. Instead, they find Jisung, a runaway from a brutal Association, whose raw, feral presence forces the strongest Alphas to their knees. Now, bound by a dark obsession and a shared enemy, the pack must decide: is Jisung their greatest threat, or their ultimate weapon?