EastEnders' favourites, Kat and Alfie take a break from Walford and head to the picturesque village of Redwater, a peaceful idyll on the Irish coast. Twenty years ago, a boating accident ripped the heart out of this village's close-knit community, and the truth about the tragedy was left buried. For Kat Moon, Redwater could be the key to making sense of her fractured past. She has come here to find her son, a twin taken from her at birth without her knowledge. But as Kat dives deeper into the community, she risks being fatally swept up in the storm she's started.