The piano recital/album sans retour forms the concluding part of Croene's 'Trilogy of Hopelessness' (Cortizona). The overarching theme is the sense of doom inherent in our responses to climate change. After the doomed indulgence in nostalgia ('cul de sac', 2019) and the doomed yearning for landscapes lost through climate change and human mismanagement ('solastalgia', 2022), he now presents 'sans retour': the doom of the inevitably failed fantasy of escape.

Six piano pieces serve as an in memoriam for six fearless aviation pioneers who ultimately lost their lives in plane crashes. The album opens with a sound recording of the communication between Yuri Gagarin and mission control one minute before the launch of the first manned space flight. At the end of Side A and the beginning of Side B, excerpts from the conversation between Richard Russell and air traffic control can be heard.

Conceived as a single, Beethovenian composition, Croene once again demonstrates the wide range of sound palettes a piano can produce. The common thread is a melody based on the 'Dies Irae', which takes six different forms to embody the in memoriam concept.