Imaginaerum tells the story of an elderly composer, Tom, who suffers from severe dementia. As he has had the disease for years and has regressed into childhood, he remembers practically nothing from his adult life. His music, friends, all his past including the memory of his daughter are a blur in his fragile mind. All he has left is the imagination of a ten year old boy. As he drifts away into coma, it seems impossible to get back what he has lost. Or is it?
| Visual Effects | Pierre Bonnette | Visual Effects |
| Writing | Stobe Harju | Screenplay |
| Writing | Tuomas Holopainen | Story |
| Production | Markus Selin | Producer |
| Crew | Mike Chute | Stunt Coordinator |
| Directing | Stobe Harju | Director |
| Sound | Petri Alanko | Music |
| Production | André Rouleau | Producer |
| Editing | Mathieu Bélanger | Editor |
| Crew | Martin Williams | Stunts |
| Sound | Anette Olzon | Music |
| Sound | Pip Williams | Orchestrator |
| Sound | Tuomas Holopainen | Music |
| Sound | Jukka Nevalainen | Music |
| Sound | Emppu Vuorinen | Music |
| Sound | Marco Hietala | Music |
| Visual Effects | Jessica Kardos | Visual Effects Coordinator |
| Camera | Benoit Beaulieu | Director of Photography |
| Art | Élisabeth Williams | Production Design |
| Production | Jukka Helle | Producer |
