Mark and his team begin to investigate the bombing, while the man has to investigate internal control over his own working methods. Tensions in Mark's team increase when an armed and dangerous group of young people linked to a bomb blast is arrested. "Bomber" Jakob tries to avenge his former employer, but at the same time has to deal with his wife's work worries and suddenly finds a new target to detonate the next bomb. A new powerful explosion is raging in Tallinn.