A research team embarks on a journey to obtain a plant that can advance medical research by centuries. While stumbling upon clues of the previous expedition, they discover that a Yeti creature lurks within the Himalayan mountains and will do anything to protect its terrain.

The Brookedale Psychiatric Hospital is a crumbling institution which barely has enough money to remain open. Formerly a prison, it sits atop a warren of tunnels and sewage system viaducts. But Brookdale has a secret - a secret known by only one person. There's something living in the tunnels - something that's developed a taste for human blood...