In their attempt to exonerate an innocent man, a group of social justice warriors raid an abandoned campsite in search of a serial killer. But, one by one, they are eliminated until it's just one person left against the prolific killer.
When the driver manages to crash the car on the road in the middle of nowhere the four-man-passenger-team (well, 1 girl and 3 guys, actually) have no other choice than to walk through the dark woods to the nearest hostel. Combine this scenario with zombies, a hockey-mask wearing giant and an annoying doll who demands popcorn, and you'll have H3 Halloween Horror Hostel.