The story is about a plain-looking vegetable market worker Gung Yan-tung (Wong Cho Lam) who mysteriously turn into the most popular cantopop star Gan Lik-shun (Bosco Wong) after he eats chocolate. While Gun Lik-shun is in "singer mode", he is by far the best selling celebrity in Hong Kong. The problem is that when the chocolate effect wears off, Gung Yan-tung becomes a regular person again. He soon develops a relationship with Tse On-fei (Kate Tsui), who has no idea of his real identity.