On a river deep in the Mexican jungle stands the colossal villa Xanadu, a wellness center that’s home to an ardent spiritual group devoted to self-help guru Paul Bentzen and his enigmatic wife, Kali. But when Paul mysteriously dies, his entire estate --- including Xanadu --- is left not to Kali, but to his estranged niece, Sveta. Shocked and confused, Sveta travels from New York City to Mexico to pay her respects. At first, Xanadu seems like a secluded paradise with its tumbling gardens, beautiful people and transcendent vibe. But soon the mystical façade wears thin, revealing a group of brainwashed members drunk on promises of an impossible utopia, guided by a disturbing belief system and a charismatic, dangerously capable leader.

In the midst of a sizzling hot summer, some of Hollywood's most notorious faces are assembled on the idyllic Caribbean island of St. Genesius to film The Siren. Three very different women arrive on set, each with her own motive. Stella, an infamously unstable actress, is struggling to reclaim the career she lost in the wake of multiple, very public breakdowns. Taylor, a fledgling producer, is anxious to work on a film she hopes will turn her career around after her last job ended in scandal. And Felicity, Stella's mysterious new assistant, harbors designs of her own that threaten to upend everyone's plans. With a hurricane brewing offshore, each woman finds herself trapped on the island, united against a common enemy. But as deceptions come to light, misplaced trust may prove more perilous than the storm itself.