Two of Walford's most iconic families - the Mitchells and the Beales - spend Christmas Day together, but with tensions high and secrets rife, events soon take a sinister turn. While Jane and Ian are desperate to protect Bobby's secret, Sharon's determined to keep her own family safe. As tensions heighten amongst the adults, little do they know that hostilities between Bobby and Dennis are escalating, triggering a catalogue of incidents, leaving lives hanging in the balance...