Mars Corporation

Several dozen international corporations are invited to a special briefing at an economic summit. The briefing is presented in an unorthodox way, inviting the uninitiated to disbelieve. Five attendees don't, and establish contact for further information.
The core five start working the plan, and create their own secret plan within the original plan.

The desire for power is not confined to Earth. The station in Mars orbit creates it's own environment for greed and murder. Killing his opponents, and even his cohorts when they don't follow orders, doesn't bother him.
One observant man uncovers listening devices and bombs planted in deadly locations. He starts a resistance group.