CHIP-IN

Each of the family members remembers the day Mr. Yoo invited them over to his house and the frightening incident that almost killed Yoo Bit Na, Mr. Yoo's daughter. Despite knowing that Mr. Yoo is terminally ill, they immediately start to fight over who is entitled to his immense fortune. Later, they celebrate Mr. Yoo's 58th birthday.

Everyone is shocked at Mr. Yoo's sudden death, especially Kim Ji Hye, who had given him sleeping pills the night before. She recalls the events leading to his death and the suspicious letter she found addressed to her, a letter that could exclude her from his will. Meanwhile, the police conclude his death is murder and start their investigation.

Bit Na finds out that her father, Mr. Yoo, has fully recovered from his cancer. Knowing this, she tries to figure out who might have known and questions the people around him. Meanwhile, everyone reads Mr. Yoo's will and is told the one condition that needs to be met for it to be valid.

Bit Na was hit by a golf club and found to be unconscious the next day. She was lucky enough to be not seriously injured and decided to go back to the house to find out who the culprit was. Dokko Sun creates a web page to gather information about Mr. Yoo and helps Bit Na to find out about the truth. And to everyone's surprise, it turned out that Mr. Yoo allowed Hae Joon as his adoptive son before his death.

The quintet tries to prepare Ms. Park to act in front of the police. Meanwhile, Sun and Bit Na find the same image of the map in Sul Young's laptop. Various evidence points toward Sul Young. When Bit Na confronts Sul Young about it, Sul Young is quite brazen. Bit Na eventually finds out who sent the letter.

Hae Joon finds out that Jeong Wook was involved in his father's death. The police take Sul Young to the station to question her about the map to the safe that was found on her laptop. Bit Na receives a letter and opens it in front of everyone. Inside, there are photos taken on the night she visited In Ho's studio. Chul immediately accuses Bit Na of injecting nicotine into In Ho. Meanwhile, Jeong Wook goes on a TV show and reveals a shocking truth.