A group of young people go on a graduation trip to a remote island. Unbeknownst to them, the island is the home of a monstrous-sized python. Though the kindly caretaker tries to help the young people, will they all be able to survive?

A snake demon in Changshou City mutilates living beings. The Descendants of the Seven Swords, adhering to the duty of guarding the peace of the world, fought the snake demon on the Black Devil Cliff and sealed it.