Sophie, a socially anxious and introverted girl who dreads speaking up in public, has always kept her attraction to girls a secret, living a timid and unassertive life. Her 80-year-old tough-as-nails grandmother Betty—a former Vegas showgirl—can't stand her granddaughter's cowardice. Without permission, Betty takes Sophie's photo and signs her up on the dating app Tinder, casually whipping up a bio that unexpectedly goes viral, racking up thousands of matches. To top it off, Betty lays down an ultimatum: Sophie must find true love within a month, or else she'll be sent back to their hometown for an arranged date.
