Boston detective Frank Shaw (Joel Kinnaman) returns to duty when a career-changing injury leaves him with permanent hearing loss. Interpreting for Ava Fremont (Sandra Mae Frank), a witness to a brutal gang murder, they find themselves cornered 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 rely on each other to outsmart killers they don’t hear coming for their only hope of survival.