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.

Now that Cheon Kyu stabbed the detective, it is certain that he is the murderer. He then flees with Yul where no one can find them. However, Yul comes up with a clever idea to give a clue to Dae Sung. Without any help from the police force, the employees of MS Mart rush over to save Yul from her father. The hostage situation is dangerous, but everyone risks their lives for Yul.