Having long-pursued a cryptic trail from native legend and archaeological artifacts, Blackthorne Shore arrives at a gruesome temple hidden in the wilds of Borneo, within which a snake-like Inhumanoid named Slither has been imprisoned for thousands of years.

The "hour" of the snake is 9:00 to 11:00 a.m., the time when the sun warms up the earth, and snakes slither out of their holes.