Liar tells the story of a night that changes the lives of Laura Newell (Joanne Froggatt) and Andrew Ellis (Ioan Gruffudd) forever. Laura is a smart and dedicated teacher, not long out of a relationship and unsure about getting back on the dating scene. Andrew is a renowned surgeon whose son is a pupil at Laura’s school. An initial attraction leads to a date, but neither fully realises the far-reaching consequences that their meeting will have on each other or their families. Truth and consequences go hand in hand in a tense and gripping thriller that examines both sides of a relationship and both sides of the truth. Are there really two sides to every story?