The entire unit has to deal with a dangerous substance, and not everything goes smoothly. Roope vents his frustration on the new fire master Krista. Mikael has a hard time facing his aging. Pietu won't leave Nella alone.

• Timo Turunen
• Susanna Åke
• Hanna Leivonniemi

• Antti Tuomas Heikkinen
• Sara-Maria Heinonen
• Juha Kukkonen