A few dozen gas stations in the region are terrorized by Cedric's racketeering quad riders gang. They're not satisfied with extortion and small fires but continue until the desperate owners sell, actually all to Marc Deferme's petrol company ArdOli. Xavier 'joins' the clumsy gang to find out if Deferme pays the thugs. Meanwhile Rick helps housekeeper Josefien flirt with mailman Ernest.

Team Rox is stunned to hear the colonel wagered that they can in only four hours find the holes in the national reserve bank's elaborate new security system, which has no human elements except biometry and a password divided over the director and his deputy. Team Rox gets into the vault, despite mysterious non-triggered alarms, but afterward the bank reports a load of gold bars stolen. Realizing it must be an inside job, they sneak out and race back, despite immediate suspension by the colonel, the stop the real thief.

After a visiting president and his wife are badly injured in a warning attack by terrorist Vladimir, who demands being invested with absolute power, team Rox is ordered by the colonel to guard their daughter in the embassy. Xavier cheerfully assumes his undercover as butler until he notices it's a baby, with Olivia as nurse. Vladimir's band attacks, helped from the inside by the president's trusted deputy Joseph.

There is a mysterious wave of thefts of art and artifacts by reputed scientists. The latest are Roman coins taken by an archaeologist who is director of the museum. He's followed to a cruise-ship. Xavier and Olivia board to put a tracer on the loot. That falls, but they learn the scientists are blackmailed by kidnapping junior relatives, like his grandson.

Fiends in stole police car and uniforms systematically rob sports cars. Fearing some cops may be in the plot, the colonel calls on Rox. The team works out the whereabouts of the last stolen police car and use Rox as perfect lure. This leads them to the fiends' lair, Ruud Wijnants's wrecking yard. But Rox had to be deactivated and Xavier gets captured most perilously.

There's an international crime wave of thefts of precious violins by Stradivarius. Rox must prevent another in the case of concert violist Petrovitsj, who is in the country for a concert. Xavier and Olivia go undercover as orchestra members, on kettledrums viz. with a gizmo so ROX can take over playing. They prevent a robbery attempt by a man wearing a venetian mask and Rick helps work out the logical suspect, while cheekily exploiting Josephine's idiotic belief in ghosts.

Football (soccer) champions FC Tigers suffer a mysterious epidemic of medically inexplicable muscular impairments. With the cup final ahead, Xavier and Olivia go undercover as grounds keeper viz. equipment manager, while Rox and Rick scan the club grounds. Xavier gets close enough by filling in for the eliminated goalkeeper, but title rival sponsor Reinhout then orders him eliminated by his cahoot, orderly Miel.

Big winners from Carlos Castaneda's casino Metropole are robbed shortly after leaving it. Oil sheik Nasir Al-Bashir refuses to sign a major deal unless the robbers are arrested. Xavier must attract them by winning big, thanks to a cheating magnet installed by Rick as fake fire alarm technician. It works, but the inside crooks see trough accomplice croupier Olivia and kidnap her.

A crime cartel demands a major villain's release or they'll repeat with fatal results their demonstrated method to sabotage the national airport's radar control. Team ROX quickly works out that the computers are affected by remote control magnet, strong enough to disturb Rox too. They must remove the magnet in place and catch the saboteur(s).

At the annual fitness test, Xavier performs as excellently as Rick abominably, and the nerd's computer cheating is spotted. So the colonel sends them all to a team building camp in the mountains. After Rick falls due to a snapping ripe, the instructor sighs the recent number of (near-)accidents just isn't normal anymore. The team rightly suspects a saboteur and works out who and why, but meanwhile the fit ones are exposed to the worst sabotage.

Rox is ordered to investigate why one after one, several food factories must close down after health inspector by Buik's team. Rick's tests prove the food isn't contaminated, so the test kits themselves must be doctored, but the fiendish assistant inspector realizes Xavier is on to him. Meanwhile at home, the housekeeper is the only left to receive a local journalist who is to write an article on Xavier after his third consecutive regional marathon victory.

Rox must investigate who plants bombs to sabotage the national miss pageant final. Xavier must go undercover as janitor, Olivia can take a spooked contestant's place. Motive is probably the disqualifying last year of a candidate and the judge she allegedly bribed. Ever after the next bomb id dealt with, danger lurks.

Because of a terrorist threat to the nation's nuclear arsenal, security is doubled under command of loyal colonel Bosmans and personal supervision of reputed national security director Swartenbroeckx, who brings a novel drone with laser weapon. ROX is ordered to test the guards and stand by in case of an attack. It occurs, but the worst danger is the drone turning on their own side.