Below the streets of Ratbridge, the cabbageheads are unhappy. Why? Their tunnels are flooding.
They send a delegation to ask the boxtrolls to turn off the water, but they can't find any boxtrolls. It's super bizarre that the boxtrolls are neglecting their duties of maintaining the tunnels underground, but before the delegation of cabbageheads can find them, they get caught in a net.
A group of men shows up to transfer the cabbageheads into sacks, and off they go, leaving some cabbage leaves in their wake.