In a warehouse in the heart of Los Angeles, a dwindling handful of devoted craftspeople maintain more than 80,000 student musical instruments, the largest remaining workshop in America of its kind. Meet four unforgettable characters whose broken-and-repaired lives have been dedicated to bringing so much more than music to the schoolchildren of this city.

When an ICU nurse volunteers to help a coma patient accused of murdering six women, he’s drawn into a chilling web of lies, obsession, and deadly secrets as a detective races to stop the killer.