An alien intending to claim Earth for his people before their homeworld is destroyed by a comet decides not to eliminate humanity when he hears their music. Instead, he lives among them until another alien is sent to find and kill him.

Over four decades, Motorhead frontman Lemmy Kilmister has registered an immeasurable impact on music history. Nearly 65, he remains the living embodiment of the rock and roll lifestyle, and this feature-length documentary tells his story, one of a hard-living rock icon who continues to enjoy the life of a man half his age.