Hilde learns more about Erie Harbor's secrets. Her father, Matt, is forced to face his past and reconnect with his own father.

Chasing down a dangerous lead brings Hilde face-to-face with a potential suspect. Matt's run-in with an old friend spirals out of control.

Hilde, Donny, and Spoon track down Birdman, a mysterious outcast who may have crucial information about the Richie Fife case.

Convinced that the wrong person was convicted in the Richie Fife case 30 years ago, Hilde sets out to prove it.

As the '80s dance looms, Hilde and Matt find a promising new lead in the investigation. Frank breaks rank to get to the root of the case.

When Hilde goes missing, Matt is forced to confront his worst nightmare.

Hilde creates a movement to root out corruption in Erie Harbor. Matt and Bridget try to mend their relationship.

A break in the Richie Fife case results in a surprise arrest. Matt and Hilde take a road trip to learn more about the suspect.

Significant new evidence is dredged up from a nearby lake. Hilde discovers that it's the beginning of a much larger mystery.