当神秘专线响起，负责接听的你，愿意付出多少代价完成任务？
该剧改编自马修·奎克的同名小说，第一季结尾，FBI基层探员彼得·苏德兰（加布里埃尔·巴索 Gabriel Basso 饰）因拯救总统而立下大功。本季中，他将正式成为暗夜行动的一分子，然而，加入这个绝密组织，也意味着投身危机四伏、尔虞我诈的世界。
To the streets, “Raq” Thomas is cold, hard and fierce — a successful and deadly woman taking names in a man’s world. She is tough, resolute, ruthless, but Raq still is capable of love. Great love. The sole recipient of that affection is her son, Kanan; he is everything to her. As much as she cares for him, though, there are many instances where one wonders if she loves him for who he is or if she loves him merely as an extension of herself. The middle child of three, Raq also carries the heavy burden as the earner for her two brothers. She is the sun, and everyone else in her universe exists in her orbit.
