Imaginaerum informs the narrative of an elderly composer, Tom, who suffers from dementia. As he has had the disorder for a long time and has regressed to childhood, he remembers practically nothing from his adult life. His music, friends, all his past containing his own daughter's memory are a blur inside his delicate mind. He has left is your imagination of a ten year old boy. It appears hopeless to get back what he gets lost, as he drifts away into coma. Or is it?