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.

Thirteen-year-old Henry Wheeler struggles to be the man of the house and care for his reclusive mother, Adele, all the while confronting the pangs of adolescence.