Tobias suffers mentally as well as physically. That we must witness every step of his degradation is rather too much the focus. Writer and director Nick Lawrence seems so keen to make a martyr of the suffering artist that he misses out on some of the other questions his narrative raises. The play is too eager to sermonise on the function of art and thereby sets the limits of its own investigation. This is a coherent show, but it lacks some of the intellectual muscle it sorely needs.