After two albums of furious jazz-rock exploration, the classic quartet lineup of Return to Forever – Chick, Al di Meola on guitar, Stanley Clarke on bass and Lenny White on drums — had established itself as one of the most durable combos in all of jazz. No Mystery was a triumph of the new form: an unstoppable sequence of now-classic tunes, played with total commitment by true masters. The electric pulse of “Dayride” and “Sofistifunk” also makes way for the instantly-recognizable title tune, the first acoustic number played by RTF since the release of Hymn of the Seventh Galaxy two years before.