Dilli Gang is the story of an old man targeted by a dangerous gang which preys on senior citizens living alone. Isambar Prasad and his wife, Sujata, are left alone in their lavish bungalow after the marriage of their daughter, Sapna, while their son, Ashish,lives in Germany. Their only confidant is their driver whom they treat as family. Sadly Sujata is stricken with a fatal illness and is about to die.
Severly affected by this sudden turn Isambar is left hopeless. One day while sitting alone in a park contemplating his future, he is spotted by Mahesh, who happens to lead the gang of thieves that prey on senior citizens. That night Sujata succumbs to her illness while the gang decides to raid their bungalow, killing Isambar in the process.