An emotional journey that follows a brain scientist who is obsessive about figuring out new technologies to access the consciousness and memories of the brain. His life goes sideways when his family falls victim to a mysterious accident, and he uses his skills to access memories from his wife’s brain to piece together the mystery of what actually happened to his family and why.
Adapted from the webtoon "Dr. Brain" (Dr. 브레인) by Hong Jac Ga (홍작가).
Do Hoon and Soo Jin are a married couple. Do Hoon learns that he has Alzheimer's disease. He decides to divorce Soo Jin out of concern for her future. The couple divorces.
6 years later, they meet again.
Set during the Donghak Peasant Revolution which took place from 1894-1895. Two half-brothers fight on opposite sides of this rebellion.
Baek Yi Kang is the first son of an important family. His father is wealthy and he is notorious as a local government officer. But, Yi Kang’s mother is from the the lowest class. Due to his mother's low social class, people look down on Baek Yi Kang.
Song Ja In is the only daughter for the head of a large peddlers group. She is the owner of Jeonjoo Yeokak, which sells merchandise and is also an inn. She has courage, stays calm under pressure and has charisma. Song Ja In dreams of becoming the best merchant in Joseon.
Baek Yi Hyun is Yi Kang’s younger half-brother. He is smart, handsome and polite. Unlike Yi Kang, Baek Yi Hyun was not born out of wedlock. Yi Hyun has everything and he treats his half-brother politely.
Park Dong Hoon is a middle-aged engineer who is married to attorney Kang Yoon Hee. However, his life is not that happy as he has two unemployed brothers, Sang Hoon and Gi Hoon, who rely on him. Moreover, his wife is secretly having an affair with CEO Do Joon Yeong, Dong Hoon's college junior but current boss.
One day, Dong Hoon receives an unexpected bribe and notices that his co-worker, Lee Ji An, saw him. Ji An is a young part-time worker at Dong Hoon's company who is drowning in debt and left alone to take care of her ill grandmother. Dong Hoon then gets entangled in his brothers' struggle to get back on their feet and the company's internal rivalry between the company's CEO and the people opposing him, all the while not knowing that CEO Joon Yeong wants to get rid of him and Ji An is working for the CEO.