Pil-ju, an Alzheimer’s patient in his 80s, who lost all his family during the Japanese colonial era, and devotes his lifelong revenge before his memories disappear, and a young man in his 20s who helps him.

10 years after “Marrying the Mafia 1”. The three J’s established an architecture company and have become well-known business. They hold pens instead of fists in their hands but things still happen around them and now even bother their children.

HONG Gildong is an infallible private detective with an exceptional memory and quirky personality. While chasing the only target he failed to find, he gets entangled in a much bigger conspiracy than he bargained for.

Sung-Chil works at the Jang-Soo Store which is owned by Jang-Soo. Sung-Chil is stubborn and has a bad temper, but he changes after meeting Geum-Nim. Geun-Nim runs a flower shop and her daughter Min-Jung does not like her meeting Sung-Chil.