22,000 MILES UP, THERE IS (STILL) NO BACKUP. They call it "Gridlocking" - maglev-bike races across the Fuse's vast solar arrays. Fast, dangerous, and very illegal. So when the #1 gridlock racer turns up dead, Klem and Ralph begin their own race to catch a killer... in a case that will force them into the dark underbellies of drug smuggling and terrorism in zero-g! Collects THE FUSE #7-12.