Seven years ago, Adri left the running world after a major scandal. She leveled an explosive and career-ending accusation at one of the world’s most celebrated coaches --- and then he died suddenly. Now, she's ready to race again. Adri has picked one of the toughest events imaginable: a 250-mile trek through the Sahara Desert organized by a mysterious and famously sadistic race director. She’s also there to get closure on the mysteries that cloud her past. Was her family targeted by one of her coach’s defenders? Was his death due to natural causes? But clarity is hard to come by out in the Sahara’s extreme conditions. And as a number of runners start dropping out, it becomes clear that there’s someone out there in the desert trying to stop anyone from winning --- by any means necessary.

In the frigid summers of the Antarctic continent, the sun never sets, and Olivia Campbell has long dreamed of spending a sunlit night in this beautiful, remote place. So when her boyfriend --- a high-powered art dealer --- decides to stage an ostentatious, career-making auction aboard a luxury cruise liner to Antarctica, Olivia can hardly believe her luck. That is, until the ship sets sail and her boyfriend is nowhere to be found, and she is left to manage both the auction and her own creeping fear of the open ocean entirely alone. And as though that weren't enough, the first bodies turn up soon after. It seems like a terrible accident. But as the situation deteriorates, it soon becomes clear that there is real danger on board --- and the closest help is hundreds of miles away.