Béla Bartók's immense orchestral work, the Concerto, created in America, is inextricably linked to the author's personal condition and mental state in 1943, prior to completing the work: continuous illness, homesickness, and fear for the destiny of his hometown and Europe. He hasn't composed in three years. Then, while in the hospital, he receives a commission to compose a grand orchestral piece. In the musical that emerges, he writes all his fever dreams, agony and bitterness, but as well – precisely in connection with the flare-up caused by the work – all his love of life and optimism.

While in the rehearsal, Tamás Juronics, the choreographer of the Szeged Contemporary Ballet, provided the Bartók Spring crew with an insight into the creative process. Along with the most well-known Bartók characters—Bluebeard, the Mandarin, and the Wooden Prince—the composer will also make an appearance on stage, portrayed by the dancer Vencel Csetenyi, who only returns for this role.