Kim Karlsen just found a dead body in her pool.

During a swingers’ party, Billy Karlsen disappears into his home office, not keen on his wife Kim’s kind of parties, but willing to overlook this single flaw in his otherwise exquisite trophy wife.

Kim’s sexuality is one thing she’s had control over in her life. And she’ll be damned if any husband forces her to make herself small. Still, it’s Dallas, Texas, and Kim keeps her open marriage as secret as possible.

There are seven suspects.

Her life changes in a moment when Billy turns up dead in the pool later that night. Six guests, plus Kim, are the only people who were in the house, and Detective Troy Underwood already has his sights set on Kim as the killer.

As the investigation unfolds, Kim questions everything she knows about her closest friends.

Did her deceased financial advisor husband owe money to Dan and Amanda, the power couple that she catches making a suspicious purchase at the super center?

Could elementary school teachers Nicole and Jason not be as wholesome as they seem?

Or could her very best friend, Jackie, and her husband, Nathan, have been responsible that night?

Kim’s head spins with possibilities.

And things keep getting worse.

Kim finds out that there’s a lot she didn’t know about her late husband. From relatives to relationships, Billy is full of surprises, even from beyond the grave.

Kim’s ex-husband and good friend, Michael, helps her navigate the investigation and juggle the care of their 15-year-old daughter, Olivia, who gets expelled for the first time in her life.

As things get more out of control, Kim wonders how well you can ever truly know another person, and in the end, how well do you really want to know anyone?