SPOILER ALERT: This article contains spoilers for all episodes of “The Perfect Couple.”

On a quiet summer morning, a body washes up on a Nantucket beach. A scream splits the air –– and a prominent family is immediately thrown into chaos.

So ends the first episode of Netflix’s soap opera drama series “The Perfect Couple,” based on the novel of the same name by bestselling author Elin Hilderbrand. Developed for the screen by showrunner Jenna Lamia (“Good Girls”), the series follows Amelia Sacks (Eve Hewson), whose upcoming nuptials to Benji Winbury (Billy Howle) are disrupted on the day of their wedding when she discovers the dead body of her maid of honor, Merritt Monaco (Meghann Fahy). As police investigate Amelia and her fiancé’s family, they discover that everyone in the bridal party — from Benji’s imposing mother, Greer (Nicole Kidman), to his charismatic best friend, Shooter (Ishaan Khatter) — has been hiding secrets that could destroy the facades they’ve all worked hard to maintain.

The series' release on Netflix on Sept. 5 marks the culmination of five years of development, and plenty of changes were made to Hilderbrand's original novel along the way. Variety compiled a list of the biggest differences between the book and the on-screen version of "The Perfect Couple" — including that killer ending.