Andres (Fran Perea) follows the lead to Melilla to meet his old acquaintances. Hilkka (Riitta Havukainen) and Luisa (Maria Romero) weave a plot with the help of which they aim to find the main perpetrators of the criminal league. However, new discoveries cause more despair. Neither of them can imagine that Hilkka might also be in danger.

Hilkka (Riitta Havukainen) returns to Finland, but the race to catch the criminals continues. The interrogations of Sohanna (Alina Tomnikov) and Petter (Paavo Kinnunen) cause unexpected pressure, and eventually someone has to speak. When the background of the criminal league is finally revealed, the researchers have to once again weave a plot, in which Hilka's contribution is also needed.