When You Open the Door, There Are Monsters

Mogyeong, an average student, gets an unexpected delivery containing a longsword and a cryptic warning to stay ready. Soon, eerie doors materialize in his home, and invaders with strange powers seize his mother, seeking “that guy’s bloodline.” In pursuit, he learns he descends from otherworldly “immigrants,” and these doors are gateways to their realm. Joining forces with newfound companions, Mogyeong embarks on a perilous cross-dimensional quest to save his mother from the monstrous beings and hidden forces awaiting beyond each threshold.