Is this written correctly? I don't know if they are run-ons or wrong words or any misplace punctuation. Please help me!!!

When a corn farmer's field was constantly being eaten by cranes and began to lose money, he determined to catch them in his net. One day he went to check for anything and found a stork, a good and helpful bird, that pleaded to the farmer for release, but the farmer refused because the stork had chosen to bein the presence of evildoers, giving him the same punishment as the cranes.