High in the Hollywood Hills, writer Lady Daniels has decided to take a break from her husband. Left alone with her children, she's going to need a hand taking care of her young son if she's ever going to finish her memoir. In response to a Craigslist ad, S arrives, a magnetic young artist who will live in the secluded guest house out back, care for Lady's toddler, Devin, and keep a watchful eye on her older, teenage son, Seth. S performs her day job beautifully, quickly drawing the entire family into her orbit, and becoming a confidante for Lady.