A group of former military elites set out to explore an uncharted abyss, not knowing their worst nightmare is waiting for them deep beneath the ground.
In 1942, a convoy of 35 civilian ships, carrying vital supplies from Iceland to the Soviet Union, faces deadly challenges in the Arctic. Despite Allied naval escort, catastrophic intelligence errors expose the convoy to relentless German air and naval attacks. In the brutal conditions, inexperienced civilian sailors fight for survival, with only 12 ships making it to their destination.
A newly appointed teacher finds herself being followed, and soon discovers that one of her own students is obsessed with her.
