On Declan's sixth birthday, his baby brother Michael dies in his crib from sudden infant death syndrome. His birthday forgotten, and not understanding what "dead" is, Declan experience's the death of his brother only through his parents' grief, frozen in their pain. Declan seeks refuge in his baby brother's room. His birthday now intrinsically linked with Michael's death, he tries to understand what has happened to his family, and if he too will stop breathing in the night. Based on a true story, SOUND ASLEEP is an intimate drama about death from the perspective of six-year-old boy.