Write a suspenseful thriller about a group of friends who go on a camping trip in the remote mountains, only to discover they are being hunted by a deranged serial killer

Write a suspenseful thriller about a group of friends who go on a camping trip in the remote mountains, only to discover they are being hunted by a deranged serial killer. As they fight to survive and escape, they must confront their inner demons and trust each other if they hope to make it out alive.