Directed by Geetu Mohandas and co-written by Yash, Toxic: A Fairy Tale For Grown-Ups follows the story of Raya (Yash), a gangster, who is raised by his elder sister Ganga (Nayanthara). For him, her words are of utmost importance. While being in a relationship with Rebecca (Tara Sutaria), Raya falls in love with Nadia (Kiara Advani), a circus artiste. Their intimate love story leads to future events in Toxic, including Raya’s face-off with his son, Ticket, from his affair with Nadia.