DI Alec Hardy and DS Ellie Miller are called to investigate a serious sexual assault.
Shockwaves reverberate through Broadchurch as news of the attack spreads.
Trish receives a shocking message, and for Hardy and Miller, suspects start to come into view.
Trish returns to the scene of the crime - will she remember anything more about the attack? DC Katie Harford discovers a strong lead - a new suspect who doesn't have an alibi. Questioned by Ellie and Hardy, Cath reveals interesting new information about the night of her party. Finally, a breakthrough - Hardy and Ellie get a match on the male DNA found on Trish. An unknown woman walks into the police station. Interviewed by Ellie and Hardy, she delivers some devastating new information.
A new witness tells Hardy and Ellie their story. This information turns Ellie and Hardy's understanding of Trish's case upside down. Katie discovers a crucial new link between the case and a key suspect. Ellie and Hardy investigate the suspect's alibi more closely and find worrying inconsistencies. Beth tells her supervisor about Trish's case. Their discussion leads them to come forward to Ellie and Hardy with new revelations. Lucas reveals what he saw on the night of the party. Jim reacts unhappyly, telling him to keep his mouth shut. A call from the owner at Axehampton forces Ellie and Hardy to hurry back to the grounds of the house once more.
Ellie and Hardy bring a new suspect in for questioning. In a search of this suspect's premises, Ellie finds devastating new evidence linking him to the crime.
Back at the station, DC Katie Harford confronts Ellie and Hardy with an uncomfortable truth about her role in the investigation.
Hardy and Ellie's new suspect gives them his detailed version of events, but when they dig deeper they begin to doubt his story.
Ellie and Hardy discover that Ian has taken a personal item of Trish's without her knowledge. They seize it for examination. What can they learn from it?.
Important pieces of evidence come to light against all the key suspects in the case - Ellie and Hardy can feel the vice tightening and know that soon, the case will crack open.
Hardy and Ellie uncover the truth behind the rape of Trish Winterman, and lives in Broadchurch are changed forever.