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Elliot and Helen travel to Ireland to find answers about Elliot's past. But after Elliot is violently kidnapped, they must each continue their dangerous search alone.

Elliot seeks help from an unlikely ally to secure his escape from the island. Meanwhile, Helen gets acquainted with some threatening figures as she continues to track Elliot down.

Elliot receives a surprise visit from Ethan, and the pair work together to track down Helen. Meanwhile, tensions are reignited between Elliot's family and the McDonnells.

Finally, with all the pieces on the table, Elliot and Helen decide to go and meet his family to flush out the truth. However, the McDonnells prove difficult to shake off.

Helen reflects on her relationship with Elliot, and whether the past has truly passed. Meanwhile, Elliot must face up to who he really is, and what that means for those he loves.

The McDonnells and Cassidys prepare themselves for all-out war. Elliot and Helen face a race against the clock to stop any more bloodshed.