Shan is a gifted but impoverished high school student who secretly serves as the ghost singer and songwriter for the popular yet narcissistic idol Kong Que. Kong Que's lack of vocal talent creates a professional reliance on Shan's behind-the-scenes contributions.

A significant facial scar from a past traffic accident drives Shan to conceal his identity with a distinctive fox mask during performances and public appearances. This injury fuels his reclusive nature and desire for anonymity.

Professionally, Shan adopts the pseudonym "Mr. Fox" when publishing original compositions online, separating his ghostwriting for Kong Que from his independent artistry. His songwriting and vocal performances form the foundation of Kong Que's public success, forging a complex dynamic between them.

Financial struggles contextualize Shan's initial acceptance of the uncredited ghostwriting role. The traffic accident remains a defining event in his history, shaping his self-perception and career trajectory.