Act II: Alban. Deirdre and the sons of Usna have lived happily on a remote island for seven years. Fergus arrives bearing an offer of peace from Conchubor, and asks Deirdre and Naoise to return with him to Emain Macha. Lavarcham warns Deirdre not to accept, and Owen, a spy in the service of Conchubor, intimidates Deirdre with suggestions that death awaits Naoise in Ulster. Naoise tells Fergus that he plans to live the rest of his life with Deirdre in Alban, but Deirdre convinces him to accept Conchubor's offer, reasoning that it is better to die young, at the peak of their love, than to grow old and live in the shadow of their past happiness.