Responding to a message from the Oberth-class science vessel, USS Tsiolkovsky, which is monitoring the collapse of a supergiant star, the crew of the USS Enterprise-D discover that the crew of the Tsiolkovsky had killed themselves after contracting an unknown virus. Thankfully, a cure for the virus is found when it was discovered that it was a variant of the Psi 2000 virus that had been contracted by the crew of the USS Enterprise (NCC-1701), 98 years earlier. Together, Crusher and Lieutenant Commander Data are able to reinsert the chips and repair the ship's engines in time to escape.