Compelling drama exploring the effects of an extramarital relationship when a married man begins an affair with a waitress. Dominic West and Ruth Wilson star.

The Butler estate prepares for the annual summer party; Noah is drawn to Alison, who feels indebted to her mother-in-law.

When Noah turns to Alison for help with his novel, their local tour proves more dangerous than expected. Plus, Cole takes a stand on behalf of the community.

When Noah and Alison visit the remote Block Island and give in to their feelings for each other, they quickly learn that intimacy can be a double-edged sword.

As passions flare, Alison and Noah encounter new difficulties at home; Alison's estranged mother visits; Noah is conflicted about Whitney's behaviour.

As their relationship continues to heat up, Noah discovers there's more to Alison than he'd been led to believe. Elsewhere, a dark secret is exposed.