A trigger-happy Swede and a timid Brit, who are both at risk of losing their badges, partner up on a grisly murder case.

Sophie and Tom catch a lead with a little help from the chief. But it means Sophie must talk to her mother for the first time in years.

Identifying a suspicious person of interest, Sophie and Tom sneak into his house and regrettably interrupt a rather peculiar religious ritual.

Tom feels a connection with Sophie's estranged mother. Sophie’s recklessness gets her kicked off the case -- until another body turns up.

Tom and Sophie go to England to question the victim's widow. Back in Sweden, a celebrated crime reporter gets involved with the case. Too involved.

Sophie's old boyfriend becomes a prime suspect. Case closed? Maybe officially, but something just doesn’t feel right.

The trail leads to a tense standoff at a cabin in the woods. The past catches up with Kristina and Tom. The killer has one last move to make.