The Southern Line Express carries all sorts of passengers. Sovian Darnell is just the newest to join the train's economy class after he's tasked with smuggling an invaluable bead across the tundra. But nothing could have prepared him for the dark reality he's met with after he accepts a seemingly innocuous drink from another rider. Suddenly, Sovian is overcome with an insatiable lust that must be quenched, and everyone on the express wants a piece of him. With no place to hide on an unstoppable train, he'll have to service his fellow libidinous travelers until he can make it to his destination. But will his stop ever come? Sovian is in for one hell of a ride, but once you hop on this train, there's no getting off.