丽莎和丹尼这对好友同为失眠所苦，总是和彼此聊天到深夜。两人一起经历各种古怪又奇妙的惊喜事件，感情也日益加深。

　　在第三季故事的5年后，Paul（马丁·弗瑞曼 Martin Freeman 饰）和Ally（黛西·海格达 Daisy Haggard 饰）面临着最大的养育挑战。18岁的Luke（奥斯卡·肯尼迪 Oscar Kennedy 饰）在圣诞晚餐上抛出了一个炸弹消息，这将永远改变每个人的生活。16岁的Ava（佐伊·雅典娜 Zoë Athena 饰）不再处于Luke的阴影下，当遇到魅力非凡的Holly（杰西·威廉姆斯 Jessie Williams 饰）时，她经历了自己的爆炸性时刻，并立即爱上了对方。Paul和Ally在面对这些最新的养育挑战时，不断尝试，失败，再尝试。

　　Channel5和Acorn TV宣布续订《达格利什》第二季。

　　The new series is going to be entitled The Tower II: Death Message and is based on Kate London’s brilliant second novel of the same name. It is being adapted by screenwriter Patrick Harbinson (Homeland, Fearless, 24, ER) and produced by his company Windhover Films and production company Mammoth Screen.
　　The series opens with Lizzie (Tahirah Sharif) returning to Farlow station where her boss and former lover, DI Kieran Shaw (Emmett J Scanlan), partners her with Arif Johar (Michael Karim). Their first call is to a domestic violence complaint against Mark Brannon, who is accused of beating up his girlfriend, Georgina Teel, and terrorising their young daughter Skye.
　　Lizzie persuades Georgina to tell the truth about what Brannon has done to her, enabling Lizzie and Arif to arrest him. However, once the case gets to court, Lizzie finds herself cross-examined on the stand, leaving the whole case on a knife-edge.”
　　Sarah knows that Fedden has handed her an impossible challenge, but she throws herself into it with typical determination and thoroughness. And, gradually, perhaps helped by the fact that she too was a teenager of Tania’s age back in 1997, she begins to uncover clues that previous investigations had overlooked. At the end of the first episode, Sarah’s investigations take a further twist, which means she and Lizzie cross paths again.