Things are crowded in the Loud household, with 12 children -- 10 girls and two boys -- causing craziness in the house. As the only boy, 11-year-old Lincoln is in the middle of all of the chaos. Zach is different from his siblings and getting along with them. Lincoln's best friend Clyde, who happens to be an only child, is jealous of Lincoln's large family and is always willing to play his part in the schemes.