When a college heartthrob is accused of rape by a less popular student, his girlfriend navigates various versions of the story in search of the truth.

Based on the backdrop of a beautiful and serene city Mussoorie, the series revolves around a mysterious story of a merciless serial killer 'AKS'. The entire city is in a miff to know about the man behind the endless murders. A fearless journalist Aditi Bisht, daughter of a celebrated senior cop of the city - Ajay Bisht and a wife of reputed cop Rishi Pant is on a mission to solve the case and find the serial killer. But a twist follows when Aditi is shocked to know about the mystery man and plans to close the case without revealing the details to anybody. But well, another surprise awaits, as Aditi gets trapped by a copycat killer claiming himself to be 'AKS'. Will Aditi be able to track down the copycat killer before he reaches the endgame of his deranged puzzle? How long will she be able to hide the truth from her husband or the people of Mussoorie? And will there be collateral damage along the way?

Every night at 10, Kolkata tunes into radio to listen to 'Kuchh Bheege Alfaaz' - an episodic series of unrequited love stories hosted by RJ Alfaz who, despite his tremendous following, prefers staying detached and anonymous. Among his many fans is the boisterous Archana, a girl working at a creative agency – which designs branded memes. She is leukodermic but lives life to the fullest. They meet; or rather talk, for the first time over a misplaced call, when Archana accidentally dials Alfaaz's number, while trying to connect with her latest blind date. Thus begins an interesting relationship between two unlikely characters, one overly compensating, but in denial of her present, and the other buried under a dark secret of his past.

"Shab" is a story that revolves around multiple characters' search for happiness and love in a complex, unforgiving, and cold city.