The Dekarangers encounter the Algolian Gas Drinkers following a high-speed pursuit, and while the Alienizer gang manages to retreat, Deka Break recovers a briefcase that they were carrying. Inside the briefcase is a top-secret virus called "Golden Snow", which was being experimented on the planet Leslie. As communications to Leslie have failed, Tetsu is assigned to travel to the planet to investigate while the other Dekarangers scout around for leads on the Gas Drinkers' whereabouts.