I am within… Why was Major Sam Carter chosen as a host by the alien invader in the STARGATE SG-1 episode "Entity"? In this exciting adventure we discover the mission that led the entity to its fateful decision… Captured by the Goa'uld Lugh, Carter faces a hard choice: help repair a cloaking device that would give Lugh a dangerous advantage or allow SG-1 to be handed over to the System Lords. But all is not as it seems among the Goa'uld under Lugh's command, and SG-1 soon find themselves recruited by underground operatives possessing a rare gift that allows them to infiltrate Lugh's inner circle. However, it is a gift that comes at a terrible price-a price that may yet cost SG-1 their lives. Meanwhile, the alien entity continues scanning SG-1's mission reports in its quest to preserve its own life…