Aseq is a horror mystery thriller set in London that narrates the story of Ronnie (Vardhan Puri) who falls in love with Lail (Sonnalli Seygall) after breaking up with Priyanka. However, after his newfound romance with Lail things take an unexpected turn for Ronnie when he starts experiencing eerie and unexplained events at his place. These strange occurrences lead Ronnie to suspect whether it is his ex-girlfriend Priyanka involved in this. Determined to find the truth and put an end to the mysterious happenings, Ronnie seeks the help of his friends —Aadi (Adi Chugh) and Sarim (Siddhant Kapoor). Will Ronnie along with his friends be able to solve the mystery surrounding him?