Klementina Ristovych and Ralph Dietrich are Homicide detectives on ‘The Fuse’, a five-mile-long solar energy platform orbiting above the earth that's also home to Midway City, population half-a-million. Ristovych should have retired years ago; Dietrich is the first cop to actually volunteer for MCPD Homicide in its entire history. Their first case together was bumpy, and Ralph was even revealed to be hiding a dark secret from his partner. Now they're investigating the death of a ‘Gridlocker’, adrenaline junkies who race stripped down maglev scooters across the Fuse's mile-wide solar dishes through the cold vacuum of space. It's a case that will take them to the literal depths of Midway, and into the dark underbellies of drug smuggling and terrorism in outer space.