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。
Code of Silence introduces us to Deaf catering worker, Alison Woods. She’s struggling to make ends meet, juggling two jobs, in a police canteen and a local bar, while also doing her best to support her Deaf mum, Julie. When DC Ashleigh Francis calls on Alison to lip read the conversations of some dangerous criminals, she is plunged into a new and exhilarating world. Alison’s interpretation of the gang's clandestine meetings quickly become key to unlocking the police investigation. But Alison's feelings about the case become complicated when she finds herself drawn to Liam, one of the main suspects. Alison knows she's putting herself at risk by agreeing to work with the police, and when things threaten to spill over into her personal life, she knows she should step away. But Alison can’t let go…
