The film then uses flash-back scenes between the adult Pink and the child Pink, trying to tie together the life of this boy/man who has this great feeling of disconnect and estrangement from everyone else, along with crushing depression.
The movie also makes great use of the music from the album of the same name, as it takes a metaphoric ride through the life of the star. Often using imagery, both subtle and quite dramatic at times, to continue the journey.
Towards the end, the main character is losing his mind. It begins to be taken over by worms, and he shaves all hair from his body, (this is another case where the life of the band inspired a part of the movie) as was done by former Pink Floyd member Syd Barrett.