Daesung Mart develops into the great MS Mart thanks to Myung Sook's bravery and Dae Sung's smartness. Although Dae Sung continuously fails the civil service exam and is about to get dumped by A Hee, his love for his mother's supermarket does not change. He determines to work there as a cashier, but runs into a case that changes his life as an employee of MS Mart. (Source: Viu

The police begin investigating the body that Dae Sung and Nunchucks Grandpa found. However, Dae Sung becomes nosy again and starts digging into this by himself. His way of investigation is looking into the shopping list of the victim. With the clues that he obtains from there, he notices a suspicious person within the neighborhood. (Source: Viu)

People now know that Nunchucks Grandpa is the notorious five-dollar bill counterfeiter. Although some evidence show that Five Dollars is the murderer, it is not enough to prove his guilt. Dae Sung is upset that the counterfeiter might be set free. However, he witnesses someone else at the murder scene who definitely seems suspicious. (Source: Viu)