ding changwang (played by guo jin'an) has been mentally retarded since childhood, and his intelligence has remained at the age of 7, and was carried by a single mother. ddd。 although awang is not very intelligent, he is upright and enthusiastic. he and his neighbor afeng (played by xuan xuan) grew up together and are childhood sweethearts. when afeng was in school, awang even handed over all his savings to afeng so that she could complete her studies in the united states with peace of mind. after afeng returned from her studies, she joined the zhong group, a large local group. in order to protect afeng from being bullied by bad people, awang also joined the zhong group as a messenger. the boss of zhong group (played by qin pei) is actually awang's biological father. his half-brother zhong zicong (played by huang zongze) is also a manager of zhong. awang's willingness and conscientious attitude towards life infected many people around him. however, can his 7-year-old intelligence cope with the hypocrisy in the adult world?