Even before her mother died and her father mysteriously disappeared, Eunha Park has always been the responsible one. Four years after her father left, Eunha is struggling to find jobs to pay for the rent, buy groceries and look after her younger sister Mina.   It is on one of her job shifts, where Eunha meets Beast's Doojoon, Yoseob, Kikwang, Hyunseung, Dongwoon and Junhyung and something unexpected happens, bringing them all together. The beginning of a long journey for E