Ivy Lynch has been babysitting practically her whole life. She is known around town, getting job offer after job offer. It pays. This summer, she receives an offer to be a full-time nanny for the Kennedy family while the mom goes on a mission trip to Haiti. Unable to turn down the job due to the promised payment, Ivy agrees to spend her summer living with the Kennedy family. That includes oldest son, Elliott, the rebellious boy from Ivy's high school whose mom doesn't trust him enough to take care of his siblings for three months. A lot can change in three months.

"Promise me that you'll always love me, josh." He hooked his pinky with mine and smiled, "I pinky promise." (lowercase intended)