Twenty years ago, gregarious Lorelei and mousy Holly became fast friends as students in the same college psychology seminar. Taught by an expert in control and human behavior, the two students also grew close to their charismatic professor. But in one twisted moment of gaslighting, their friendship flamed out and Lorelei’s once-promising future fell apart. Flash forward, Holly has everything Lorelei ever wanted, while Lorelei is a lonely cat lady. Now, Holly is even up for an award at a Woman of the Year ceremony, and Lorelei finally has the perfect opportunity to get the revenge she’s wanted for years. But she’s not the only person who has been obsessively following Holly’s career --- and when someone winds up dead, Lorelei realizes she may be in danger as well.

When Emma’s husband, Ben, falls in love with a large Victorian mansion for sale in upstate New York, he swears to her the fixer-upper will be worth the risk. With a baby on the way, Emma would like to live in a charming, safe community --- and in a space larger than a one-bedroom New York City apartment. On impulse, she agrees to Ben’s plan and they put in an offer on the house. Sure, the mansion has a somewhat creepy backstory and is a bit dilapidated, but Emma and Ben are in this together. Aren't they? When strange things start happening, Emma begins to experience a little buyer’s remorse. What’s the real history of this house? Is its dark history repeating itself? Why does her husband suddenly seem so distant? Is she in danger? Is her baby?

Charlotte has everything in life that she ever could have hoped for: a doting, artistic husband, a small-but-thriving flower shop, and her sweet, smart five-year-old daughter, Daisy. Her relationship with her mother might be strained, but the distance between them helps. And her younger brother Rocco may have horrible taste in women, but when he introduces his new girlfriend to Charlotte and her family, they are cautiously optimistic that she could be The One. But as Rocco and Ruth’s relationship becomes more serious, Ruth’s apparent obsession with Daisy grows more obvious. Then Daisy is kidnapped, and Charlotte is convinced there’s only one person who could have taken her.

When Emily asks Stephanie to pick up her son, Nicky, after school, she happily says yes. Nicky and Stephanie’s son, Miles, are classmates and best friends, and the five-year-olds love being together --- just like she and Emily. But Emily doesn’t come back. She doesn’t answer calls or return texts. Stephanie knows something is terribly wrong; Emily would never leave Nicky. Terrified, she reaches out to Emily’s husband, Sean, offering emotional support. Then, she and Sean receive shocking news. Emily is dead. The nightmare of her disappearance is over. Or is it? Because soon, Stephanie will begin to see that nothing --- not friendship, love, or even an ordinary favor --- is as simple as it seems.