A secret community app exclusively for alphas and omegas—no betas allowed. During the hectic rush hour, a provocative post appears on its anonymous board: "Omega in heat, currently loose on the train to ** at XX station. As they say...the early bird gets the worm. Good luck hunting!" As nearby alphas eagerly join the hunt, Haeyoung, caught off guard by an unexpected heat, finds himself trapped in a dangerous game of pursuit. With predators closing in, can he escape before it's too late?