In the sweltering summer, "Jaehoon" experiences a mysterious accident, leading to an unusual situation where an older woman named "Doin" takes over his body.
"There must be a reason we met. Let’s try to find it together." Over three years, Doin helps Jaehoon recover his frail body, and during his career struggles, he turns to his lawyer father for advice.
"The law is neither just nor fair." Hearing his father’s words, Jaehoon and Doin develop a curiosity about true justice.
Will Jaehoon be able to realize it through the law?