The Bros is a story about a penniless history teacher Suk-bong who has no interest in his younger brother Ju-bong, a promising businessman at a construction firm. The family reunion takes place at their father's funeral in their hometown Andong, after many years of separation.
During this reunion, Suk-bong is only interested in finding relics at home that could make money, while Ju-bong is focused on winning the contract for the Andong highway construction project for his company. One day, they accidentally hit a mysterious lady named 'Aurora' with their car, causing her to suffer from memory loss.
As time passes, the two brothers start to uncover secrets about their family through Aurora that they had never known before.