Hilkka Mäntymäki's team is strengthened by the arrival of Luisa Salinas, flown in from Spain. The investigation leads the police on the trail of a transport company specialising in the waste business.

Hilkka, Luisa and Andrés arrive in Gran Canaria to raid a container that has left Finland. Jami Kalliola continues to investigate the case in Finland. The murders reveal a link to a professionally run smuggling business.

Hilkka tracks down the killer and the forces behind the smuggling plot are revealed. An internal threat endangers the life of a witness and the entire investigation - will Andrés and Luisa get there in time?