What happens at the end of Deep Water? Highsmith wrote it very differently

Here's how it all ends — and how far the film strays from Patricia Highsmith's 1957 novel.

What happens in the film's ending

Vic has already drowned Melinda's pianist boyfriend Charlie (Jacob Elordi) in a pool, passed off as an accident. When her old flame Tony Cameron (Finn Wittrock) reappears, Vic kills him too and dumps the body in a gorge. Suspicious writer Don Wilson (Tracy Letts) finds Tony's wallet and races to expose Vic — only to crash his car during a frantic chase while Vic pedals home on his bicycle.

The real ending happens in the house. Melinda finds Tony's wallet among Vic's things — hard proof her husband is a murderer. And she burns it.

Why does Melinda protect him?

That's the film's whole twist: she's not a victim, she's a participant. Lyne's version — scripted by Zach Helm and Sam Levinson — reframes the marriage so that Vic's murders become a warped proof of passion, and Melinda's affairs the provocation that keeps it burning. The final scenes show the couple reconciled, complicit, and apparently ready to carry on exactly as before. Even the closing credits keep the mood off-kilter, playing over their young daughter Trixie singing in the back of the car.

Nobody is punished. That's the point.

How Highsmith ended it

The novel goes somewhere much darker. The broad strokes match — Vic drowns Charley in the pool, kills Tony, and hides his body in a quarry reservoir — but Melinda is never complicit. Instead:

• She plays along — feigning renewed warmth towards Vic in the hope of drawing out a confession.
• She sets a trap — arranging for Vic and Don Wilson to arrive at the quarry at the same time, where Don finds bloodstains.
• Vic snaps — knowing Don is heading straight to the police, he races home and strangles Melinda to death.
• He's caught — Don arrives with a policeman at that exact moment, and Vic is led away.

So in Highsmith's version, Melinda dies and Vic is arrested. In Lyne's, they drive off into a shared future built on two murders and one burnt wallet.

Which ending is better?

Depends what you want from it. The novel's finale delivers consequences and fits Highsmith's bleak view of suburban marriage as a trap. The film trades that for something stranger — a portrait of two people who genuinely deserve each other. Critics were split, and the "huh" factor of the finale became one of the most-discussed things about the film.

For the record: Highsmith wrote Deep Water two years after The Talented Mr. Ripley — and Vic Van Allen might be the only killer in her catalogue who ends up happier married than Ripley ever was alone.