[1] Kümmel, Kalle and Horst work for the contractor Werner Wiesenkamp, who runs a small construction company in Bergkamen in the district of Unna.

However, Wiesenkamp hires the young architecture student Philipp as an additional worker (much to Horst's dismay), who actually only needs an internship certificate for his new employer in Asia.

Kümmel, Kalle and Horst stage Marek's death by falling down from the scaffolding, and ask Wiesenkamp to pay for their silence.

After work, Kümmel, Kalle and Horst pretend to dismember Marek's "corpse" and bury it on the construction site while Philipp is inconsolable.

Thanks to Philip's help, the construction project can continue as planned, and the initial teasing stops abruptly.

However, when Werner Wiesenkamp's wife and his brother disappear to Majorca, things take a dramatic turn.

When Werner Wiesenkamp, who is also a sports pilot, sees Marek alive at the airport, he drives to the construction site to confront its employees.

Meanwhile, Werner Wiesenkamp plans to mount the aerial bomb from the construction site under his sports plane and drop it on his brother's house.

Although Kümmel, Kalle, Horst, Astrid and Philipp can thwart his insane plan, the bomb detonates when handled with the excavator.