Ten months earlier, her mother, Shin Jung-im, died in a car accident, while her nine-year relationship with her fiancé, Jo Dong-jin, ended abruptly when she saw him cheating with Do Yeo-joo, a fellow flight attendant infamous for being a homewrecker.

The CEO of Greenland's robot division, Kwon Deuk-bong, pesters Nan-gil's mandu restaurant everyday to sell the land.

Nan-gil was adopted by Bae Byung-woo, the ruthless chairman of Dada Finance, a loan shark company, and trained to become a cold criminal.

The orphanage that once stood in Na-ri's childhood home was destroyed by chemical fire, killing everyone except for Green Land's secretary, Ms. Kwon.

In response, Green Land and Dada have been working together to discredit her family; they set up Sung-kyu and Jung-im's brother, Jeong-nam, into a debt that forced them to go on the run.

Byung-woo's assistant and adopted son, Kim Wan-shik, eventually betrays him by helping Nan-gil get a document exposing Dada's crimes.