In the early morning of April 9, 1940, the Danish army is alerted: the Germans have crossed the border.
The body of a young woman is found in a Stockholm hotel room. It appears that she has been strangled after a night partying with two young men, but the room was paid for using the credit card of a mugging victim whose alibi doesn't add up. Martin and Gunvald investigate under the supervision of their new boss Klas Freden.
A wild bachelor party and an agonizing defeat in floorball awakens Fredrik's passion for male synchronized swimming.
