在南极洲的北极星六号国际基地，讲述科研工作者们的“极端的生存悬疑”故事：南极洲长达半年的漫长冬天来临，极夜中，有10个科研人员留守在基地，中途与外界断了联系。而此后，当外界的科研人员返回基地，迎接他们的是灾难性的景象：留守10人中已有多人死去，1人失踪，两人幸存。黑暗、冰封、与世隔绝的基地中，到底发生了什么？Winter has fallen on the South Pole. The sun will soon disappear for the next six months. A small team, known as the Winterers, will remain at the Polaris VI Antarctic Research Station to continue their innovative research, a crucial part in the fight against climate change, under the command of renowned biologist Arthur Wilde (John Lynch). But when spring comes, summer commander Johan Berg (Alexander Willaume) returns to the station only to find the entire team are either dead or missing. A killer is on the loose and Annika (Laura Bach), Johan's wife, is missing. If he wants to find her alive, he will have to trust Maggie (Katharine O'Donnelly), the young doctor who is profoundly shaken and apparently the sole survivor from the group - or, is there someone else?