In this Star Trek: New Frontier novel, Captain MacKenzie Calhoun faces simultaneous threats from two of the most destructive forces he’s ever encountered.

The first is the D’myurj—a mysterious and powerful alien race bent on either the complete domination of humanity or its destruction—a potentially massive risk to the very foundations of Starfleet, one that goes so deep it’s impossible to determine whom to trust. The second is even more alarming: Morgan Primus, once a living creature with a soul and a conscience, now an incredibly sophisticated but dangerous computer simulation taking up residence within the very core of the USS Excalibur. MacKenzie Calhoun is playing a perilous game as he attempts to outwit and outmaneuver these new enemies, with the fate of the Excalibur crew members and potentially the lives of billions at stake.