A young woman on a train, enroute back to England from Switzerland, meets a charming older lady who promptly disappears. The other passengers deny ever having seen her, leading the young woman into a complex web of mystery and high adventure.

Riddick must fight for his life after being betrayed by his people and stranded on a desolate planet and left for dead. On this unbearably hot planet, Riddick is up against predators of an alien race. Using his emergency signals, he summons two ships: one transporting a mercenary, and the other led by an old acquaintance.