The saga with the breakout bestseller Illuminae continues on board the space station Heimdall, where two new characters are about to confont the next wave of BeiTech's assault. With deadly alien predators picking off the crew one by one, and a malfunction in the station's wormhole threatening to rip the whole space-time contiuum, the fate of everyone on the Heimdall, the Hypatia is in their hands.