A major addition to the concertante trombone repertory, this single-movement work lasting 30 minutes was premiered in 2017 by Jörgenvan Rijen and the Royal Concertgebouw Orchestra, conducted by Iván Fischer. Press reviews were ecstatic: ...this magnificent concerto enriches the repertoire...The trombone sang, sang, sang...then suddenly a spectacular mating dance of four trombones à la Stockhausen. At the very end van Rijen and MacMillan struck me down completely: between the serene harmonies which came to a moment of rest, the trombone once more entered with a heart-breaking eruption...the wonderful beauty of despair...It is a concerto for eternity, and trombone players could use one. - De Trouw.