Peter is mistakenly identified as transgender, which leads to an unexpected event and an important learning lesson.

When the guys volunteer to chaperone the high school prom, Quagmire hits it off with Courtney only to discover that she is his daughter. To his and the gang's surprise, Quagmire makes a serious effort to embrace parenting Courtney, joining Peter and Meg on an ill-fated father-daughter camping trip.