Kathleen and Alfie Moon leave behind Albert Square to travel to the sleepy Irish fishing village of Redwater in search of Kat's long-lost son. They uncover a secret the villagers would have preferred to remain buried.
As the villagers struggle to come to terms with their loss, Roisin's estranged sister Eileen returns from America after 20 years away, and Alfie tries to persuade Kathleen not to go to the wake, but she goes along regardless.
Agnes organises a memorial BBQ. Family tensions rise as Eileen realises how much she and Keiran have missed by moving.
When Keiran is forced to face his fear of water, past memories flood back about the night of the boating tragedy.
Eileen is shaking up the Bryne's family with her plans for Cois Dara. Dermott confronts Peter with the truth.
Bernie pieces together the truth about Lance's death. Agnes shuts Peter down when he threatens her. Alfie is left fighting for his life.
