Tsathogghua's curse awaits the unwelcomed investigators of the occult and unknown. What grim secret lurks on the sterile Greenland icecap? What living horror grows beneath the "Bigfoot" legend.

The core of ToT is two scenarios, "The Trail of Tsathogghua" and "The Curse of Tsathogghua", which are loosely connected. The original editions of ToT also include a third, unconeccted scenario, "The Haunted House".

Each scenario has the potential to take very long time -- in a good way -- to complete. Handouts and red herrings galore.