Glasgow artist Lachlan Goudie examines the life, work and legacy of Scotland's most celebrated architect and designer, Charles Rennie Mackintosh - the man Lachlan Goudie calls "The greatest genius in the history of Scottish art". The film examines Mackintosh's iconic buildings, notably the Glasgow School of Art. Interwoven with his architecture, design and watercolours is the personal story of Mackintosh. Little known at home, his work found favour on the continent. In later years he struggled for work, and came to endure real poverty, but continued to create remarkable pieces of art.