Long Hot Summer.

Lin and Li are two ad-men short of inspiration for a commercial about high heels. Li’s girlfriend Nancy tries to inspire him by striptease, but Li secretly lusts after his luscious boss Manager Tong. Lin spots a girl who he thinks ideal for the ad, and befriends her after retrieving her stolen purse from a thief. Her name is Wan Yo Ha, and she takes an immediate and full-on liking for Lin. But she secretly works for Tsao, who runs a rival ad agency. In between numerous sex scenes, Li and Lin work on the commerical, with five lovely young models.