The life of the keyboard composer John Bull is cloaked in mystery. He's glimpsed only fleetingly as a player in the murky secret theatre of the court of Elizabeth I.

In this free elaboration on Bull's life, his times and his music, expert witnesses - including the virginalist Sophie Yates, the writer Charles Nicholl, the scholars David Smith and Martin Souter - offer a portrait of the man and his art within a musical frame composed by Steven Faux and featuring the saxophone of Will Gregory.