Driven to desperate measures, nurse Cath Hardacre assumes the identity of her best friend, an A&E doctor, and finds work in a struggling emergency department.
Cath finds herself falling for Andy and wonders how can she keep hold of the perfect man when she is living a lie. An encounter with someone from her past threatens to expose her secret.
Following his discovery, Andy has a decision to make. A fatal error at work backs Ally into a corner - does she protect her identity or fall further into the lie?