Kyung Chul is the head of the Lee Family and lives with his son, daughter-in-law, and two of his three grandsons. Hyun Jae, the second grandson, is a talented divorce lawyer. Hyun Jae goes to meet a very special client on behalf of his boss, Hae Jun. Meanwhile, Kyung Ae goes to a wedding and gets upset when her friends point out that none of her sons are married yet.

Mi Rae desperately wants Hyun Jae to take her on as a client and convinces him to do so. She goes around collecting evidence, even meeting with Jun Hyung. Meanwhile, Kyung Ae gets Min Ho and Kyung Chul together to come up with a plan to get her boys married. They decide to make the boys' competitive nature come out by putting up a tempting prize.

The three brothers find themselves being offered an apartment unit for the Marriage Project. Soo Jae is excited to take part in it, but Yoon Jae and Hyun Jae are just baffled by it all. They wonder if they should actually agree to participate in this race. Meanwhile, Mi Rae continues to struggle with cutting ties with Jun Hyung.

Hyun Jae and Mi Rae find out about the assault charge that Jun Hyung filed. Mi Rae is scared that Jun Hyung might cause more trouble in her life. Meanwhile, Yu Na goes to take her exam with Soo Jae's enthusiastic support. However, when things don't go as she planned, she reconsiders Soo Jae's offer.

Soo Jae's family gets caught off guard when he brings Yu Na home as someone he will marry. However, he casually introduces her to them, and the family's elders become fond of her. Meanwhile, Hyun Jae's mind keeps thinking about the divorce case his ex-girlfriend So Young Eun brought to him that he refused to take on.