When Jessie Choi's mentor Jimmy Hightower collapses at a gig and loses consciousness, she finds herself reluctantly pulled back into the jazz scene she abandoned years earlier. In investigating the music and mystery behind Jimmy's comatose state, every thread leads to the same question: is Jimmy somehow trapped in this enigma known as The Blue? In her search to save her teacher, Jessie rubs shoulders with legends, uncovers the secret history of Blue Note Records, and faces her own deepest fears.