Boston detective Frank Shaw (Joel Kinnaman) returns to duty after a career-changing injury leaves him with permanent hearing loss. Ava Fremont (Sandra Mae Frank), a deaf witness to a brutal mass murder, is tasked with interpreting and finds herself trapped in a soon-to-be-condemned apartment building when the killers return to eliminate her. Cut off from the outside world, these two strangers must lean on each other and outwit the skilled killers they can’t hear for their only hope of making it out alive.