Rascal To Chai-yan brings a false charge of selling fake medicine against doctor Fan Tin-sang, who is sentented to a twenty-year imprisonment. Fan makes an escape after a decade, and secretly provides for the education of his son Fuk-kwan brought up by a poor blacksmith. Fuk-kwan grows up to be a doctor practising in the country. To again does harm to Fuk-kwan, only this time Fan intervenes. Both he and To die in the fight.