After witnessing nothing but acrimony between his bickering Mumbai-based parents, Kishen and Mala Chopra, Bunty refuses to marry his girlfriend, Tanya Gonsalves. He is then introduced to her eccentric grandfather, Professor Anthony Gonsalves, and finds that the latter has invented a time-travel machine. Bunty travels back in time – specifically Holi 1975 – when Mumbai was called Bombay and gets to meet his parents when they were younger. He is shocked to find his buck-toothed wimpy father, and his mother – a goon-like tomboy.