Caleb Zelic, profoundly deaf since early childhood, has always lived on the outside - watching, picking up telltale signs people hide in a smile, a cough, a kiss. When a childhood friend is murdered, a sense of guilt and a determination to prove his own innocence sends Caleb on a hunt for the killer. But he can't do it alone. Caleb and his troubled friend Frankie, an ex-cop, start with one clue: Scott, the last word the murder victim texted to Caleb....