Proof

A grisly find at Dublin Port prompts an investigation; journalist Terry Corcoran probes allegations of human trafficking from Eastern Europe to Ireland; a German banker reports the theft of his laptop and his car.

Maureen starts a new job for the Social Democrats as media-relations officer; Nina uncovers a credit card scam at the nightclub where she suspects her sister is being held.

When Terry taps his brother-in-law's financial expertise to analyze the data on the disc stolen from Erskine's apartment, he realizes that it points to a conspiracy of money laundering and campaign-finance violations. Meanwhile, frustrated by the authorities' inaction and bureaucratic red tape, Nina decides to take matters into her own hands to get justice for her sister.

Terry is furious when the paper quashes his exposé on Carrick at the behest of the police, so he goes to the campaign headquarters to confront Maureen, who then becomes determined to get to the truth. Meanwhile, Nina persuades Steffi to go to the police, who finally close in on the traffickers.