The Tellarite colony world of Kharzh'ulla is a planet of many wonders, but its greatest feature is the Ring, a massive orbital construction, serviced by a series of "space elevators." During the Dominion War, the elevators were damaged by a Jem'Hadar attack. Now, a year and a half later, the elevators have weakened to the point that the entire Ring may collapse, endangering the planet's population -- unless the crew of the U.S.S. da Vinci can save them.