It is the 23rd century. Admiral Kirk's midlife crisis is interrupted by the return of an old enemy looking for revenge and a potentially destructive device. But Khan is back. Aided by his exiled band of genetic supermen, Khan - brilliant renegade of 20th century Earth - has raided Space Station Regula One, stolen a top secret device called Project Genesis, wrested control of another Federation starship, and now schemes to set a most deadly trap for his old enemy Kirk... with the threat of a universal Armageddon!.