The only hearing person (CODA) in a family of deaf people. Eun Gyeol is a model student by day, but at night, he leads a double life as a guitarist in a band. After having an argument with his father, where his father learned of his musical interest, he time slips to 1995 and meets his parents when they were younger. He strives to know more about his parents' youths and make his parents' lives shine brighter.

(Source: Wikipedia)