Shanghai: Three young Americans find themselves caught in the mysterious web of a man known only as "Smith." Smith's world, "Flatland," is terrifying. A place where the past and the present exist at the same time and intersect with deadly consequences.

Jagger gets his hands on a deadly nerve agent developed during WWII, and soon after an entire village of people is decimated. JT and Mitchell set out to find who is responsible, while Smith's rage reaches a boil. The horrors of his past encounters with Kahn are revealed, as they come full circle into the present with a new, unexpected target: Linda Meyers.

A vicious car accident puts a young boy in a coma and leads Mitchell into a divine encounter with the ancient goddess of mercy, Xian Gu. Smith dispatches JT, Linda and Amy to investigate a strain of deadly knock-off drugs, secretly commissioned by Jagger, with JT also on the path of a brutal murder weapon he himself may have created, in the past.