In the haunting new season of Netflix’s breakout horror-thriller, Sweet Home Season 4, the world stands on the edge of collapse as monstrous evolution surges — and the line between human and creature continues to blur.

Song Kang returns as Cha Hyun-su, now feared as much as he is hunted. Struggling to control the terrifying powers within him, Hyun-su becomes a reluctant symbol of hope — or destruction. Go Min-si reprises her role as Lee Eun-yoo, whose strength and resilience are tested as she leads a desperate group of survivors through the ruins of a society that no longer resembles the world they once knew.

But with the virus mutating and a new breed of monsters emerging — faster, intelligent, and driven by twisted desire — humanity faces a terrifying question:
What if the monsters aren’t trying to destroy the world… but replace it?

With heart-pounding suspense, emotional reunions, and shocking betrayals, Sweet Home Season 4 raises the stakes in a brutal fight for existence — and the truth behind the transformation.