The kidnapper only had a plan to kidnap the oldest son of the Vander Family. Vander's family has many enemies, and the kidnapper is one of them. When someone makes a mistake, they won't ever admit it and blame someone else for their mistakes. The kidnapper is one of the culprits who doesn't want to admit their mistakes.
The kidnapper planted a spy on one of Vander's businesses to destroy their business. But the kidnapper underestimated Luck Vander at that time, and then Luck Vander got his revenge on the kidnapper. Luck Vander almost lost one of his right-hand men in that incident because the kidnapper didn't stop even after they found out by Luck Vander.
