During the court case, the swim coach realized that he entered a contract and signed it where he has to work for 10 years minimum. He agreed to never reading the contract and understanding the terms set in the contract.
The judge ruled in favor of the plaintiff. Since the defendant committed a unilateral mistake by not reading the terms of the contract, he can't void the contract. He must finish the rest of the 3 years as a coach to complete the 10 year term stated in the contract.
The Principal was happy to get the coach back. All the students were happy to hear the news of the coach returning. The swim coach hired a nanny that got really well with the kid. At the end, everyone was happy and it all ended well.