These are the Voyages of the Starship Excalibur, carrying on the glorious Star Trek tradition with an exciting new cast of characters: MacKenzie Calhoun, the scarred, alien captain, personally recommended by Captain Jean-Luc Picard; Commander Shelby, the ambitious first officer - and Calhoun's former lover; Dr. Selar, the Vulcan physician formerly assigned to the Enterprise; Ops officer Robin Lefler; and the rest of the crew of the Excalibur, boldly going where no Star Trek series has gone before.
As the Thallonian empire succumbs to violence and insurrection, the Excalibur is beseiged by a flood of refugees. But a mission of mercy erupts into a tense hostage crisis when a treacherous planetary government demands Federation technology in exchange for the lives of the hostages. Captain Calhoun faces an awesome decision: Violate the Prime Directive - or witness a massacre!