Discovery is the second studio album by French house duo Daft Punk, released on 3 March 2001, by Virgin Records. It marks a shift in the sound from Chicago house, which they were previously known for, to disco, post-disco, garage house, and synthpop-inspired house. The album provided itself as a soundtrack to the anime film Interstella 5555: The 5tory of the 5ecret 5tar 5ystem, which was a collaboration between the creators of the album, Leiji Matsumoto, and Toei Animation. All of the music videos for the tracks on the album are segments of the film, which follows a story of a kidnapped extraterrestrial band. Discovery is recognized as a concept album in reviews by New Musical Express and Spin magazines. Early versions of the album included a "Daft Club" membership card. The card included a code which granted access to an online music service, which featured tracks later released on the album of the same name and Alive 1997.