One day, Doha appears before Dohun, calling him hyung as if they were brothers. But something feels wrong. Dohun soon realizes that this visitor is not human at all, but a figure pulled straight from the recurring dreams that have haunted him for years.

Since Doha’s arrival, strange and unsettling events begin to twist Dohun’s once-normal life. His own parents turn against him, he can never seem to get any rest at night, and the line between dream and waking starts to dissolve. As fear takes hold, Dohun grows convinced that the only way to end this nightmare is to kill the thing wearing his brother’s face.

But when he finally confronts Doha, the creature only smiles and murmurs, “You can’t get rid of me, hyung. It’s impossible. So let’s stay together forever.” Now Dohun must face a terrifying question: is Doha real—or just the reflection of his own fractured mind?