譚詠麟
The movie's main song () known in English as "Illusion", or sometimes as "Phantom" or "Mirage", is used throughout the movie in a music box and is also used in the ending credits. It was composed by Chinese composer and music producer Lam Manyee, written by Lam Man-Chung and sung in Cantonese by lead actor Alan Tam. A version in Mandarin, also sung by Alan Tam, was later released under the same Chinese name.