Anne Hathaway Has an 'Indecent Proposal' for Matthew McConaughey in 'Serenity' Trailer (Exclusive)

ET has an exclusive sneak peek at the trailer for the thriller, about a fishing boat captain whose ex-wife resurfaces and asks him to plot a murder.

"I want you to take him out on your boat and drop him in the ocean for the sharks."

Anne Hathaway plays a blonde femme fatale who resurfaces to ask her ex-husband (Matthew McConaughey) for quite the favor in the upcoming thriller, Serenity, and ET has an exclusive first look at the trailer. The Caribbean-set drama reunites the Interstellar co-stars for what promises to be a steamy, intense and potentially murderous affair.

"I'm here, fishing, going about my day and my life gets interrupted," McConaughey explains of the film's storyline. "My ex-wife, Ms. Hathaway, who's really a damn fine actress, shows up out of nowhere, like a ghost, and calls me by another name and she has a very indecent proposal for me."

The full trailer dropped on Thursday:

Serenity, which arrives in theaters on Oct. 19, was written and directed by Steven Knight (Locke) and co-stars Jason Clarke, Djimon Hounsou and, perhaps most thrilling for McConaughey, Ms. Diane Lane, whom, he says, "I've been a fan of and who I had my fair share of crushes on."

Courtesy of Graham Bartholomew/Aviron Pictures
Courtesy of Graham Bartholomew/Aviron Pictures
Courtesy of Graham Bartholomew/Aviron Pictures
Courtesy of Graham Bartholomew/Aviron Pictures

Here is the movie's official synopsis:

"From the creative mind of Oscar nominee Steven Knight comes a daringly original, sexy, stylized thriller. Baker Dill (Matthew McConaughey) is a fishing boat captain leading tours off a tranquil, tropical enclave called Plymouth Island. His quiet life is shattered, however, when his ex-wife Karen (Anne Hathaway) tracks him down with a desperate plea for help. She begs Dill to save her -- and their young son -- from her new, violent husband (Jason Clarke) by taking him out to sea on a fishing excursion, only to throw him to the sharks and leave him for dead. Karen’s appearance thrusts Dill back into a life he’d tried to forget, and as he struggles between right and wrong, his world is plunged into a new reality that may not be all that it seems."