In 1997, Dae-sung and his mother, Myung-sook, caught a counterfeiter in their corner store and were honored as brave citizens. In the present, he takes an internship at the struggling store, now the size of a supermarket, after failing the civil service exam.

At the cathedral where Bo-yeon's slipper was found, Dae-sung finds key evidence. He also realizes that inside Kyung-ah's shopping bags hanging on her door are items sold at MS Mart, so he starts tracking the stalker through customers' shopping lists.

The neighborhood is in chaos with the secret of the nunchucks revealed. Meanwhile, an investigation on Five Thousand Won as the suspect in Bo-yeon's murder begins, but no proof is found. Dae-sung, suspicious of Fish, follows him and finds a shocking truth.

With Five Thousand Won's alibi confirmed, Ji-woong begins to suspect Dae-sung. When Dae-sung's fingerprints are found at Kyung-ah's murder scene, he is immediately arrested. The true killer must be found to clear his name and protect MS Mart from scandal.

Yool runs into Five Thousand Won as she hurries off somewhere. As Dae-sung and Myung-sook begin looking for Yool, they grow suspicious of Chun-gyu's behavior. Meanwhile, a deadly tension heightens between Veggie and Meat, and Veggie faces a crisis.

Another case of attempted murder puts the neighborhood in shock. Ji-woong still suspects Dae-sung, and someone even makes a false report on him. Dae-sung starts doubting everyone working at the mart. In the meantime, he finds out Yool is being abused.

Chun-gyu visits MS Mart and buys his usual items. He mentions his sick wife, but Dae-sung grows suspicious of him. Ji-woong brushes off Dae-sung's concerns about Chun-gyu's suspicious behaviors. But Dae-sung runs into Chun-gyu while looking for Yool.

Dae-sung is accused of attempting to murder Ji-woong. Both Yool and Chun-gyu disappear, and the situation is at a dead end. Ah-hee decides to stall time until Dae-sung finds Yool. Dae-sung, Ah-hee, and Myung-sook team up to track down Chun-gyu.