It's easy to feel forgettable. Nyx literally is, and the condition seems to be getting worse. Homeless and alone, she's at the end of her rope when she stumbles onto Earth Between, a nexus between worlds. The residents may be magical and alien, but they don't have any problem remembering she exists.

Though she never intended to become the Guardian of a Waystation between worlds, the gig is pretty simple: act as glorified passport control for the ley lines that connect the planets. But when an illegal traveler slips through her Station, she's given an ultimatum: apprehend him or lose her new job—and the only place she's ever belonged.

Things start looking up when the illegal traveler turns himself in, until Nyx learns he actually came to Earth looking for her. He thinks his best friend—and Nyx's ex-boyfriend—hid the most powerful object in the universe with her: the Harvester of Worlds. Nyx is determined to sort out this intergalactic mess, even if she has to visit the most dangerous planet in the galaxy and rescue her ex-boyfriend to do it.

If she suspects she's been wearing the Harvester of Worlds as a necklace, what's the worst that could come from a power object with a name like that?