In this broken world… I plan to survive ‘together’ with him." Eunsu has a prophetic dream, revealing the arrival of the "Day of Darkness"—the day monsters will invade Earth. Realizing he has awakened a special ability, he begins preparing to survive the impending apocalypse. To increase his chances, he approaches Jaeyoung, a hidden powerhouse he saw in his dream, treating him kindly in hopes of sticking by his side. As they grow closer, Eunsu realizes that Jaeyoung harbors unspoken feelings for him. Before he can fully process his emotions, the red moon rises, signaling the beginning of the catastrophe. As people begin awakening supernatural abilities and hordes of monsters descend upon the world, the existence of gods, destruction, and salvation comes to light. In a world rife with conspiracy and betrayal, can Eunsu and Jaeyoung make it to the end—alive?