When Raj with his two friends Adi and Aaryan was caught in a jail cell in Pune because of the wooden cylindrical tube found in his bag , his only chance was to go out and find who put it in their in the first place. New to the town and unaware of the danger following him in this journey that takes him from Pune to Mumbai and finally to Prayagraj.

Will he be able to solve the mystery behind the tube? Will he be able to save himself and his friends? Will he be able to find the last piece of the puzzle?

Does his college Chandigarh College of Engg. & Technology where he met Adi and Aaryan holds the last key to this lock?

In this journey to the unknown he discovered relationship and friendship like never before which finally led him to the real truth and his secret well wisher "The Last Musketeer".

Who is this Last Musketeer?