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Warning: Major spoilers ahead for “Sirens.”

Netflix’s new dark comedy “Sirens” is so addictive, it may leave fans calling out for more.

“Sirens” takes place over Labor Day weekend on a lavish island called Port Haven, where aspiring lawyer Simone DeWitt (Milly Alcock) is working as a live-in assistant to the enigmatic and alluring billionaire Michaela Kell (Julianne Moore). Simone’s life among the upper class is disrupted by the arrival of her older sister, Devon (Meghann Fahy), who treks from Buffalo to the town in order to reconnect with Simone and get help taking care of their ailing dad, Bruce (Bill Camp).

The five-episode series is adapted from Molly Smith Metzler’s play Elemeno Pea, which she wrote while attending the Juilliard School. She serves as the showrunner.

During its premiere week, “Sirens” debuted in the No. 1 spot on Netflix’s English TV list and amassed 16.7 million views in four days.

Although “Sirens” ends by tying up the main characters’ storylines, some questions remain, leaving fans wondering if this is the last they’ve seen of everyone.

Here’s what happens to every major character, and a rundown of whether “Sirens” could be back for season two.

The ‘Sirens’ ending swaps the fates of Simone and Michaela

At the end of episode four, after Simone rejects his proposal, a drunken Ethan (Glenn Howerton) calls her a monster, blames her for his problems, and trips and falls from the estate’s cliff. Ethan doesn’t die, though. In the finale, he wakes up in the hospital high on meds with both his legs, an arm, and a couple of ribs broken, though he’s expected to make a full recovery.

Michaela then fires Simone after learning that her husband, Peter (Kevin Bacon), and Simone kissed. Even though it was a momentary lapse in judgment from Peter that Simone didn’t instigate, Michaela feels that Simone can’t be trusted anymore and has become a threat to her marriage.

Devon chooses to return to Buffalo with her dad to continue being his caretaker, rather than spend a month on a yacht with Morgan (Trevor Salter), one of the locals she hooked up with. But Simone refuses to join them, because she’s unable to forgive her dad for neglecting her as a child, since his actions led to her ending up in foster care.

Simone runs back to the Cliff House with no plan, just desperate not to return to Buffalo. In doing so, she bumps into Peter, who proclaims his love for her.

Mid-gala, Peter ends his 13-year marriage to Michaela and starts a relationship with Simone, who he believes will bring “love and light” into his life (and maybe even another child).

Simone then morphs into Michaela 2.0, adopting her cultlike mannerisms and embracing her new position of power at the estate. She and Devon have an emotional goodbye, knowing that they’re embarking on completely different paths.

On the ferry ride out of Port Haven, Devon runs into Michaela, who’s been ousted from Cliff House and has no idea where she’s headed.

Devon apologizes for accusing Michaela of being a murderer and a cult leader, and Michaela accepts her apology and encourages Devon to cash the $10,000 check she gave her at the start of the series so she can fund a better life for herself in Buffalo.

The series concludes with Simone, wearing an elegant light-blue gown that Michaela got her for the gala, standing at the cliff, staring at the vista during sunset with the hint of a smile.

Will ‘Sirens’ return for season two?

The short answer: probably not.

“Sirens” is categorized and promoted as a Netflix limited series. That said, a second season isn’t entirely unlikely.

“Adolescence” skyrocketed in popularity since its debut in March and is currently Netflix’s third most-watched English-language show of all time, behind season one of “Wednesday” and season four of “Stranger Things.” Although it was labeled as a limited series, Brad Pitt’s production company, Plan B Entertainment, is reportedly interested in some form of a second season of “Adolescence” after the first season’s success.

Considering how well “Sirens” has performed on the streamer since its release, it wouldn’t be surprising if the series didn’t end up being limited after all. But for now, Netflix hasn’t announced any further plans.

Fahy told Variety that the show reaches a natural conclusion, but she could imagine a continuation.

“I, for one, would love to know what happens to Michaela, where she goes,” she said. “So I think it’s definitely within the realm of possibility. We didn’t talk about it on set, but I would love to do more.”

Metzler, for her part, told Glamour that questions about a second season mean that fans are invested in the characters.

“I wrote the play 15 years ago,” she said. “I’ve been thinking about them this whole time. I could write them until the day I die. I’d never say never, but could I do them justice in another season? I’d have to think about it.”

“The fact that so many people are asking is really encouraging,” she added.

All episodes of “Sirens” are now streaming on Netflix.