In 2026, solar flares contaminated Earth's atmosphere, turning anyone overexposed to the fumes into a zombie. Survivors sheltered in hastily built Climate Emulation Centers — but some found the safe life unbearably dull. Thrill-seekers took to racing on the abandoned circuits outside and found that running down wandering zombies solved two problems at once. The authorities noticed and offered the drivers a prize: an off-world colony spot worth a fortune. With no marshaling and everything at stake, the racing turned violent fast. The rule everyone remembers: "Drive to Survive."