The plot summaries of the ten stories with references to the gaming supplements that influenced each tale are:[3][4] The Eternal Chinaman: In San Francisco 1920, a stage magician hires his brother to protect him from a Tong-style cult.

Lovecraft's tale The Call of Cthulhu in reference to a cult of sorcerers who live in the mountains of China planning the downfall of humanity.

Captains of Industry: In Boston 1921, union members of a washing machine manufacturing company break into the lodge of a secretive order called the Hermetic Order of the Silver Twilight, hoping to gather incriminating evidence on their boss who is a member with the Lodge so they have a bargaining point to improve their working conditions.

The Whisper of Ancient Secrets: In Victoria, Australia 1925, an insane inventor hopes to travel to the centre of the universe and the Outer God Azathoth before the machinations of the Cult of the Sand Bat ruin his plans.

The story features the cult-like organisation New World Industries (NWI), which first appeared in the gaming supplement The Fungi from Yuggoth and later in At Your Door and Unseen Masters.