In the not-too-distant future, humans are under attack from cancer-like outbreaks called Intralien Invasions. These invasions are just that, intrusions upon the human body, at the subatomic level, by living, breathing, thinking beings.
There is a solution for those that can afford it: A private military company called The Micro-Union--in possession of cutting-edge size-changing technology--will send its roughneck platoons into a host body to destroys the Intraliens living within.
The Soldier Called Rickard leads the most effective fighting team in the entire Micro Union.
On a routine mission inside the body of a foreign dignitary, Rickard has a change of heart and sets into motion a chain of events that will utterly destroy the Tanhauser Squad, once and for all.