The frustrated middle-aged son Tian Lixing (Louis Koo) encountered many crises in his life: his mother died of illness, his work was not going well, and his wife asked for a divorce. While in this unbearable predicament, Tian Lixing's 79-year-old demented father Tian Yixiong (Francis Ng) suddenly became like a reborn cicada, shedding his skin one after another and getting younger and younger - 60, 52, 37, 28, and 19 years old. The six stages of his father's life reappeared, and Tian Lixing also shuttled through the six eras of the "six fathers". Tian Lixing, who had never seriously gotten along with his father, got to know his father in these six stages again. From his father's turbulent life, he seemed to have found his own way out and the direction to start again...