Tim Samuels, former engineer of the USS Yorktown is given command of his own ship; The Discovery NX-04 after the ship was almost destroyed in an attack with the Romulans. 46 people were killed including the former Captain and 1st officer. Samuels has the job of patching up the ship before they head back to a starbase for repairs. While scavenging parts in a debris field, Romulan spies attempt to ambush the ship and crew before repairs are complete.