One year after the release of their self-titled debut album Gift and following numerous concerts in Germany and neighbouring countries, lead singer Helmut Treichel and Nick Woodland, the second guitarist alongside Rainer Baur, left the band in 1973. Dieter Atterer joined as the new guitarist and also took over the vocals. Instead of a singer, Dieter Frei was brought on board as a keyboardist, playing the piano, Mellotron, organ and Moog synthesiser, he significantly altered and expanded the band’s sound. The guitar-heavy hard rock of the two lead guitars, combined with the powerful organ and the Mellotron, which often played flute-like passages, became noticeably more progressive and experimental.

Recording sessions for the second LP, Blue Apple, took place in 1974 in Hamburg at the record company's own Teldec-Studio, with producer O. B. Hartmann. Released that same year by Teldec’s subsidiary label Nova, the album went completely unnoticed, as the record company failed to undertake any promotional activities. Although the quintet performed a few more live gigs, the band members went their separate ways towards the end of the year. Like their debut LP, the second and final album was released only in Germany, and both are now not only outstanding examples of German heavy progressive rock, but also sought-after and expensive collector’s items. Especially as a promo edition!