According to Sony Classical, Dreamer "tells the story of a father who, for the love of his daughter, sacrifices everything to save the life of an injured racehorse and bring the promising filly back to her former glory." It is based on the career of the horse Mariah's Storm. John Gatlin is the writer and director; the cast includes Kurt Russell, Dakota Fanning, and Kris Kristofferson.

The music for the film is by John Debney, who composed the scores for The Passion of the Christ, Sin City, Elf, and other films.

One of the most sought-after soloists in the classical world, Bell has previously appeared on the soundtrack albums for Ladies in Lavender, Iris, and The Red Violin. The score for the latter film, by John Corigliano, won an Oscar; the composer later turned it into a concert work, which Bell has frequently performed.