Nina is acting quite strange... Could it be that she's in love? Meanwhile, the donation box has been stolen from the school administrator’s office!

Matteo is caught by Mr. Sass with the stolen donation box, but claims that it was given to him by… a tiger? With Mr. Sass threatening to punish Matteo for a theft he may not have committed, the Peppercorns get to work on cracking the case.

Franzi confronts her father, Nina has trouble with Max, and the Pellicanos discuss the accusation made against Matteo – while Mr. Sass threatens to call the youth welfare office.

After the Peppercorns conclude that Franzi must have been stealing from their classmates, Max confronts her in the boxing gym. But there's a lot about Franzi that he doesn't know.

Franzi tells Nina that she was the one who stole the cash box. But Nina doesn’t believe her – so Franzi finally tells Nina the truth about her dad, who’s promised to never steal again. The Peppercorns decide to put him to the test.

When Max is at a boxing match with Nina, he gets a call from Emma: Eddie has run away! Should they call the police? Max has another idea…

As Mr. Sass apologizes to Matteo for accusing him of stealing the cash box, Nina announces that the real culprit has turned himself in. Grandpa announces that he’ll be visiting from Italy earlier than expected, and Nina’s dad fends off a secret admirer.

Maria, Nina, and Matteo are horrified to find that someone has completely destroyed the surprise they put together for Antonio. Luckily, the Peppercorns are on the case.

Emma discovers that hydrangeas are being cut off all over the neighborhood. Meanwhile, Jackie is heartbroken over being rejected by Nina’s dad. But that’s not her biggest problem right now…

Nina's grandpa arrives in good spirits. He’s even brought along Nina's cousin Marcello, who Max still thinks is Nina's ex-boyfriend! Meanwhile, Emma watches with interest as Jackie gets into a heated argument on the phone with her irresponsible brother, Marvin.

In the bathroom of Jackie’s houseboat, Emma discovers the cut-off hydrangeas and calls Henri. Just as Henri starts telling her about all the dangers of smoking these flowers, Tarik unexpectedly shows up…

Just as Tarik realizes that Emma is hiding in the houseboat bathroom with the stolen hydrangeas, Max arrives and threatens to call the cops. Later, Max angrily approaches Marcello about Nina, but they don't share a common language, which results in a big misunderstanding.

The day of the award ceremony has arrived, and everyone is in a great mood — except for Max, who’s furious with Nina and refuses to speak with her. Meanwhile, rumors are flying among the church congregation about the nature of Hannes and Jan’s relationship.

While cleaning out the headquarters to find items to bring to the flea market, Henri digs up an old Geiger counter. Meanwhile, Hannes’s ex-girlfriend Debbie shows up and starts behaving inappropriately, and Nina doesn’t understand why Max still won’t talk to her.

When Henri notices that his Geiger counter has gone off, he quickly alerts Emma. Emma’s convinced it’s just an old piece of junk, but when Debbie sees what’s going on, she makes a suspicious phone call. Meanwhile, Max is still refusing to talk to Nina.