After a daring diamond robbery, the thief, while attempting to double-cross his partners, is mortally wounded, and hides the diamonds in a lamp of a horse-carriage(Victoria) No.203. The owner of this Victoria is blamed for wounding the thief and is arrested. The wounded thief gives a key, a piece of paper, and verbal instructions to a hospital ward boy, and dies. The wardboy follows the instructions, goes to Bori Bunder Railway Station, opens the locker with the key, deposits the paper in the locker, and goes on his way. Then Raja and Rana are released from prison, and come across the key and hilariously set about trying to find the lock to this key, not knowing that they are putting their very lives, as well as the lives of the owner of the Victoria, her boyfriend, and a child, in jeopardy.