In a town where distrust for the police runs rampant, two detectives go undercover as a married couple to try and solve the year-old case involving the murder of a German surfer.

Detectives Helene and Thomas are quickly thrust into their undercover roles as a married couple. The pair get acquainted with the town's most prominent personalities and begin to stitch together clues.

Helene and Thomas's cover is put to the test during a double date with a prominent local couple. As new leads come in, the detectives take unexpected risks and break laws in the pursuit of clues.

As the investigation grows, so does the body count. Just as Thomas makes a break in the case, an explosive argument between him and Helene threatens to jeopardize the entire investigation.