A deaf catering worker who is struggling to make ends meet is called upon by a police detective superintendent to lip-read the conversations of criminals.

Alison's vital lipreading aids the detectives in uncovering the gang's plans, but she can only conceal her meeting with Liam from them for so long.

Alison's risky tactics identify the gang's target, but her deception and the gang's escalating violence threaten to unravel her relationship with Liam.