Link is chopping onions for a French Onion Soup, but wonders why his eyes won't stop watering? With some investigating and Gastro Bob's help, Link gets his answer along with a solution for tear-free chopping. Then, Captain Cook is not sure what to do with his treasure chest of unripe avocados, Link has a perfect science solution to get these avocados ripe and to ready to make Guacamole.