Lincoln wages war after his food is filched from the refrigerator.
At school, Lincoln is taking a test while also thinking about mac 'n' cheese bites he saved at home. At the Loud House, Lynn Sr. is getting himself ready for the arrival of a food critic/investor named Timothy McCole, and wants to make sure he gives off a good impression, because if he succeeds in impressing him, he might give Lynn Sr. an investment to let him open his own restaurant. Sometime later, Lincoln walks up to the fridge to get his mac 'n' cheese bites, but to his discovery, one of his three mac 'n' cheese bites is missing. Lincoln accuses his sisters, and they reveal that they have an occasion of stealing each other's leftovers, since they're a large family. This gives Lincoln an idea.
Sometime later, Luan arrives, intending to steal one of Lincoln's mac 'n' cheese bites, but upon grabbing the container, she tugs on a string that drops a large watermelon onto her foot, breaking it. Realizing that Lincoln is playing dirty, Luan decides to get in on the action as well. Soon afterwards, whenever one of the siblings attempt steal someone else's leftover, a prank is pulled on them, resulting in different forms of physical harm ranging from paint bombs, getting electrocuted, getting booby-trapped, or being exposed to radiation. Unhappy with all the injuries they're getting, Lincoln and Lisa propose an idea that's sure to satisfy everyone: they divided the fridge into 11 equal sized color coded compartments so they know whose food goes where. Approving of this system, the siblings decide on which of Lynn Sr.'s leftovers they want, and proceed to put them into their own portion of the fridge.
Lynn Sr., arriving back from the store, begins putting his ingredients into the fridge, but leaves when he forgets something. Luan and Lisa enter the kitchen, and prepare to feed themselves the leftovers they chose, but discover Lynn Sr.'s ingredients placed in their compartments, and throw them away, believing they came from one of the other siblings. As Lynn Sr. puts more and more ingredients into the fridge, the siblings toss them out as well. While driving back home, Lynn Sr. notices that Timothy McCole is at the front doorstep, waiting for Lynn Sr.'s arrival. Upon arriving home, Lynn Sr. escorts Timothy into the house, and is prepared to make a meal, but to Lynn Sr.'s horror, all of his ingredients are gone, and the siblings admit that they threw them away, believing they belonged to one of the other siblings. Luckily, the siblings propose that they give Timothy the leftovers they saved in favor of whatever Lynn Sr. was going to cook, and Lynn Sr. decides to go along with it. Giving Timothy the leftovers, he ends up liking it, since all of the other places where he has tried food was something fancy, like caviar, pâté, and uni. As a result, Timothy gives Lynn Sr. a large investment, and departs.
Later, as the siblings wash dishes, Rita decides to celebrate her husband's success by eating chocolate cake, but Lincoln informs them that there's no cake in the fridge. Rita reveals that she hid it under the couch, since she too has leftovers that she doesn't want others to touch. Lynn decides to get it herself, but gets hit by a paint bomb in the process, since Rita booby-trapped it.