Happy Ghost vs Young & Dangerous

After leaving Chan Ho Nam (Ekin Cheung character from Young and Dangerous weries) his brother Banana joins Chiu Tze Hung to become the main force of the new crime society. In the struggle for power Chiu kills Banana. But with the help of the Happy Ghost, the ghost of Banana is resurrected in the flesh of a bitter woman and turns into a big sister, seeking revenge