Cal Sounder is a detective who specializes in a very particular sort of case. So he is surprised see his newest murder case appears to be just a typical techie. But it turns out this typical techie is over 7 feet tall and pushing 90-years-old. Clearly, he’s a Titan. Cal’s specialty.

In the distant future, a genetic plague has separated humanity in two – Subterraneans who live in underground burrows to protect their health, and strong surface-dwelling Omniterraneans.