Sisko and his officers take the Defiant to a remote system in the Gamma Quadrant for a trade discussion with the Karemma representative, Hanok. During the talks, two approaching Jem'Hadar warships are detected. The enemy vessels target the Karemma ship, which flees into the gaseous, volatile atmosphere of a nearby planet. Sisko enters the dangerous area in pursuit, and the Defiant is blinded and buffeted by high turbulence. They employ an echo-location technique to find the other ships, but the pulse gives them away to the Jem'Hadar, who attack and cripple the Defiant, leaving the ship trapped in the planet's volatile atmosphere and the crew in danger.