The team finally has a holiday, but Rick is stuck doing inventory with Joske and Olivia 'volunteers' herself and Xavier to help out as volunteers in a private seals care center, which is in danger of being closed after repeated mysterious accidents. It's run by capable Paul and the philanthropic founder's grandson Mark, who is in love with the only other employee. Campig there, Xavier and Olivia find out the sad truth of greedy sabotage.

The team is instructed to examine why Karel's Karting is in danger of being closed after a series of recent incidents, endangering its mostly young go cart users. Xavier goes undercover and suspects the repeated mysterious accidents are the result of sabotage by regular mechanic Ronny, who is arrested despite lack of motive. Meanwhile research shows the sabotage is probably organized by an industrialist developer, who already owns all surrounding properties, bids on Karel's and has an inside accomplice.

Olivia en Xavier gaan naar een stuntshow kijken waar plots een ongeval gebeurt met een stuntman. Team ROX vermoedt dat er kwaad opzet in het spel is.

While the country hosts an annual four nations amazons jumping competition, horses are mysteriously spooked. The latest victim,princess Sofia of Prussia, also receives notes threatening with lasting consequences unless the bows out. The colonel, after whom the base's forbidden pet, a foundling dog, is named, orders ROX to go undercover. Stableboy Xavier and vet Olivia suspect the stud farm owner's daughter, who competes for their own country. Rick and Rox work out the method, ice darts. But the saboteur stops at nothing.

The team is mobilized for a credible threat to detonate o bomb on a huge dam, which would flood a vast area. The MO points to a never-caught specialist from the colonel's youth. He's also housekeeper sergeant Joske's scorned lover, and demands her to delivery a huge ransom. Meanwhile the team works out his trick to avoid his bombs being found.