Shylock is a Malayalam action-drama, helmed by Ajay Vasudev. The movie stars Mammootty in the lead role. The megastar is appearing in the role of a ruthless moneylender in Shylock. Mammootty is playing two different aspects of his character, who is known as Devan aka Boss, while Rajkiran appears as Ayyanar. Shylock will mark Rajkiran's first onscreen collaboration with the megastar.
Boss (Mammootty) is a ruthless moneylender who majorly finances the films. He is also a complete movie buff. Prathapa Varma (Kalabhavan Shahjohn), a popular film producer cheats Boss by not repaying the money he borrowed from him and further upsets him by ignoring his phone calls. However, Boss retaliates in an unimaginable way and causes great trouble for Prathapa Varma. The producer decides to eliminate the moneylender from his way, with the help of his close friend Felix John (Siddique), the city police commissioner. But Boss has his own motives behind messing up with Prathapa Varma. What happens next forms the crux of the story.