Danger lurks in the Albstadt Bike Park! An unknown perpetrator is stringing wires across the downhill track, and it’s none other than eleven-year-old Alex who rides into this wire trap and has an accident. Was Alex merely the victim of a silly prank? Or is there possibly a madman behind the attack who hates cyclists? As the police are in the dark, Alex teams up with his friends Linus and Bea to form a detective gang. It doesn't take long before the mysterious "Wire Trap Perpetrator" strikes again. Under these circumstances, can the Mountain Bike World Championship take place in Albstadt? The ALB Detectives investigate the cycling opponents. Can they stop the "Wire Trap Perpetrator" before there are more victims among the cyclists? Thrilling downhill descents, fast-paced chases with bikes and drones, and a nighttime adventure in the woods promise excitement.