June, a broke Brooklyn girl, can hear what babies are truly thinking. To pay her adoptive mother's medical bills, she takes a nanny job for the Whitmore family, New York's old-money elite. When their baby heir won't stop crying, June uses her "baby-whisperer" gift to expose allergens, spies, and schemes—silencing skeptics and winning the cold, grieving CEO Alex's heart. Her investigation unravels a conspiracy: the Van Doren family plants moles through "The Cradle House" to seize the Whitmores' fortune. In the end, June exposes the truth and discovers her own identity—she is the long-lost sister of Alex's late wife. Revenge, reunion, love, and a happy baby-filled ending.