The Great God Ryutaro (played by Min Tanaka) Owl operates secretly as the country's behind-the-scenes mastermind, sometimes helping many politicians and business leaders to cover up various scandals and sensational events.

However, Ryutaro's son Oishenryu (played by Makensuke Nitta) is contrary to his father and insists on righteous ideas and behaviors.

However, he faces the most difficult challenge in his life - the mysterious death of the son of the next prime minister candidate who has close friendship with the Ogami family. Ryutaro gradually approaches the truth about the great evil hidden in the political world from the dark side of the country and the bright side of the country.

A legendary mediator in Japan must bully a journalist into silence after he threatens to reveal a breaking story.

Ryutaro must assist the Prime Minister.Ichiro's mistress is secretly colluding with a mysterious man.

Ryutaro gained a deeper understanding of his children's lives.At the same time, cracks appeared in Yumiko's perfect life.

Maruyama's brother is arrested and a scandal begins to gather momentum, but Yumiko discovers her husband's secret.

Ryuu Taro is deeply disturbed by Ryu's association with a foreign journalist, thus exacerbating the tension between them.

Maruyama is questioned as evidence of his brother's scandal comes to light.

Maruyama came under increasing pressure in Congress, and his brother took matters into his own hands.

Ryutaro decided to come forward to solve the problem between Ichiro and his wife.

Ryutaro was caught off guard by the final vote of the assembly, and he began to suspect that there might be another mediator.

The Okami family is on the verge of collapse as each member must deal with the threat posed to them by a new Mediator.