Cop Ken ignores doc's dismissal of 'penis length pills' bought on Internet, preparing for an unexpected date with Lisa, who was forced to by two tickets for the annual dance, where Ken surprisingly excels. Bosnia veteran Jurriaan seems doc's most amiable patient, until his obsession with imaginary friend Elian, a salmon, kicks in. Outspoken wise-guy schoolboy Bas Van Deurse, the brightest in Lisa's class, runs away after protesting in vain he didn't vandalize any nest boxes.

To Martinus's horror, his embarrassing blood-phobia becomes the talk of the town. Plumber de Groot even mounts a fake gushing wound crisis to make fun of doc in the pub. The local radio even feeds a generally spreading fear that his medical performances wold be dangerously hindered. When teacher Lisa calls him to examine junior genius Bas van Deurse, who fainted after a gym fall but is suspected of malingering, their unsolicited layman opinions infuriate Martinus, who refers them to hospital, where nothing serious is diagnosed. At night, Bas has a grave crisis, which the repentant MD now recognizes as life-threatening spleen crisis. The helicopter is too far and the ambulance late, so improvised emergency is the bright knave's only hope. In hospital, the source of the rumor becomes clear.

Bas is infected with a highly contagious skin disease, so Tinus orders complete isolation, but finds him at school and scolds Lisa, whose application for principal will be handled by a committee he's asked for. When Bas's mother is hospitalized, Tinus expected her to take in Bas, but he wanders off and ends up sleeping in his hero's surgery. Rivalry abounds in budding romances.