While Jenny Parker (Sabrina Carpenter) and Lola Perez (Sofia Carson) each interview for a coveted photography internship, they accidentally swap phones. And when the Anderson family calls Jenny's phone looking for a last-minute babysitter, audacious Lola, in need of some extra cash, picks up and nominates herself. Meanwhile, dependable Jenny is already set to babysit the Cooper family for the evening. Unfortunately, Lola's first attempt at babysitting takes an unforeseen turn when one of the Anderson kids sneaks out to go to a concert. Jenny determined to protect her reputation and Lola with the remaining kids in tow, head out and have the adventure of a lifetime during one magical night in the big city.