Captain Pike, concerned about the upcoming trial of Una Chin-Riley, leaves Spock in command of the Enterprise while he attempts to find legal representation for Una.

Spock is stressed about being in command, even though the Enterprise is at Starbase 1 undergoing maintenance and inspection. Doctor M'Benga suggests Spock try music and hands him a Vulcan Lute.

Uhura picks up a message from La'an Noonien Singh indicating an "anti-Federation threat" on Cajitar IV. Admiral April does not give Spock permission to go after La'an because Cajitar IV is a planet under heavy dispute with the Klingon Empire and Starfleet interfering could risk another war with the Klingons.

Spock decides that the only course of action is to steal the Enterprise and go anyway. Lieutenant Mitchell simulates a coolant leak in the intermix chamber to get non-essential crew and the inspectors to evacuate the Enterprise, but the chief inspector, Commander Pelia, is not fooled by this.

Pelia goes to the bridge and confronts Spock, but instead of reporting him, she offers to help. She indicates that she knows Spock's mother and that she knows Spock would only do something like stealing the Enterprise if there was a very good reason. Giving advice to vent plasma from the nacelles to help sell the idea that their warp core is going critical and offering to serve as the temporary Chief Engineer for this mission.

On Cajitar IV, La'an explains that she has discovered the presence of a syndicate named the Broken Circle made up of former soldiers of both the Klingons and Federation who have decided that peace has been bad for business as during the Klingon war, the dilithium mined at Cajitar was sold for high profits.

M'Benga and Chapel go off to deal with inhabitants of Cajitar IV who are suffering from ion radiation, but while they treat Oriana's parents, a Klingon and two humans come by and kidnap them. These are part of the Broken Circle and they have people who need medical attention. M'Benga and Chapel are taken to a massive cave where they see a Federation starship which seems to be cobbled together from a variety of stolen starfleet vessels.

M'Benga and Chapel use a vial of Protocol 12 from M'Benga's medkit (think supersoldier serum) and use the stimulant to empower them to fight their way to the ship's transponder in hopes of getting a message to the Enterprise. The starfleet ship is going to be used as a False Flag operation. The plan of the Broken Circle is to use this starfleet ship to fire on a Klingon ship due to arrive soon, thus re-ignighting the Klingon War.

They are able to successfully get a message out to the Enterprise and the Enterprise fires on the ship to prevent it from firing on the Klingons. When the captain of the Klingon Ship calls Spock out, Spock is able to talk down the Klingon from going to war by agreeing to talk with him over a barrel of Blood Wine.

Later while talking with Pelia, he asks her about what it is like to be a Lanthanite, to which Pelia says that having such a long life can get incredibly boring, and that the main reason she wanted to help was because the Vulcan Spock following a hunch and stealing the Enterprise to do it was anything but boring. She implies she may want to stick around to be entertained more.

Finally at the end of the episode, Spock is rebuked by Admiral April for violating a direct order, but April lets him off early indicating that this time the hangover from the Blood Wine will be Spock's punishment, but if Spock ever pulls a stunt like this again, the punishment will be severe.

After disconnecting, Commodore Tafune questions April about why he let Spock off early. April said that whether Spock knew it or not, he just helped prevent the Federation from having to fight two wars at once, and that if "this war" happens, they need all the good officers they can get. We then see a map display showing an object near the Galdonterre system identified as a Gorn attack ship, setting up the primary threat of Season 2.