LO feels worry when she realizes that the development of HEI HEI is comparatively slower than other kids. She takes HEI HEI to visit SIN for deviation in order to have better understanding. SIN discovers that the skull of HEI HEI has a scar, which scares LO. Family KIM suspects that TONG has dropped HEI HEI carelessly during baby-sits. TONG denies and feels torturous for their accusation. One day, CHI meets LO and MEI on the street while they are purchasing papayas. CHI offers them a hand and crashes a wooden trolley by accident. Suddenly, CHI recalls her long lost memory and realizes the true identities of FUEN FUEN and HEI HEI.