With the piranhas gone, Milo and Max inspected the tunnel where the water had come from. It wasn't a winding, natural tunnel like the ones moles make. "Look," said Max, touching the wall, "this hole goes straight up, like a chimney!"

Mayor Mabel squinted at the ceiling of the tunnel. "I know this work," she said with a frown. "This wasn't an accident. It was Farmer Fluffy from the surface!"

Farmer Fluffy was a grumpy gardener who didn't like molehills in his nice grass. To make the moles move, he had dug a deep hole right above their town. He wanted to wash them away!

He had dragged a heavy hose to the hole and turned the water on full blast. Tons of water had rushed down, filling the tunnels. "He poured a whole pond in here!" cried Milo.

Then Max found a clue stuck in the mud—a fish food wrapper. "He didn't just pour water," Max whispered. "He put the piranhas in the hole on purpose to scare us!"

The moles were not scared anymore; they were ready to protect their home. "If Farmer Fluffy thinks water will stop us, he doesn't know moles," said Mayor Mabel bravely. "We are excellent diggers, and we are smart."

They needed to plug the hole before Farmer Fluffy turned the hose back on. Milo grabbed his shovel and said, "Let's send that water right back where it came from!"... to be continued!