Tango is a talented but languorous young man. His grandfather is a retired teacher and often criticizes him for not being enthusiastic in life. His grandmother loves him very much, but unfortunately his grandmother is diagnosed with dementia and is warded in the hospital. Through a freak accident, Tango falls into a manhole and travels instantaneously back to the ‘60s and meets both of his grandparents when they were young. Tango comes to understand and realize that his grandmother’s dream is to win the 'A-Go-Go Princess' dancing contest. He decides to help his grandmother win the contest, but would his involvement change the whole course of history? Let's engage in this nostalgic sitcom to reminisce the glory days of the A-go-go.