Imaginaerum follows the journey of Tom, an aging composer afflicted with advanced dementia. Over the years, the illness has caused him to revert to a childlike state, erasing nearly all recollections of his adult experiences. His memories of his music, friendships, and even his daughter have faded into obscurity. What remains is the vivid imagination of a ten-year-old child. As Tom slips into a coma, the possibility of reclaiming his lost memories seems out of reach. Or is it?