McCoy on loan to a space station and attacked by Klingons

[celestial-spy.livejournal.com]

Hey there,
Does anyone remember a fic where McCoy goes on loan to a space station to attempt to cure a disease. The federation didn't really care about the disease until they opened a new trade agreement that would be affected by said disease. Anyways an admiral sneaks aboard something of value that he knows is wanted by some Klingons and switches it for the virus leaving the virus in the docking bay. McCoy has to sneak out into the docking bay to retrieve the virus so it isn't spread throughout the entire station while the Klingons are attacking. Kirk receives the distress signal and is freaking out. He has to relinquish command to Spock because he is too compromised. McCoy is a general badass and saves the day while almost dying in the process.
Anyone know?