On a quiet suburban night, eight long-time friends gather for a dinner party as a rare astronomical anomaly approaches: Miller’s comet is passing close to Earth. The group includes Emily, a dancer questioning her career; her boyfriend Kevin; host Mike, a defensive actor; his yoga-enthusiast wife Lee; cynical Beth; and amicable analyst Amir, who has brought along his volatile new girlfriend, Laurie, Mike's former flame. The mood shifts abruptly when cell phone screens mysteriously crack simultaneously and the neighborhood suffers a total blackout, save for a single house glowing brightly down the dark street.Seeking help, Amir and Kevin walk to the illuminated house, returning with unsettling news: the residence is an exact replica of Mike’s home, populated by mirror versions of themselves. They also discover a bizarre book containing photos of the dinner guests and numbered ping-pong balls—items mirroring those in Mike’s living room. As paranoia takes root, the friends realize the comet is splitting reality into overlapping, parallel dimensions. Desperate for stability, Mike ventures out again to leave a threatening note at the alternate house, unwittingly starting a escalating territorial conflict.Tensions boil over as dark secrets and buried resentments surface under the extreme
psychological pressure. Laurie becomes unhinged, accusing the others of wanting to replace her, while Mike's toxic insecurity alienates the group. Realizing that each time they leave the house, they risk crossing into a different, increasingly unsettling reality, Emily decides to take matters into her own hands. Motivated by a desperate desire to escape the chaos and find a version of life where she feels truly fulfilled, Emily hatches a plan.Sneaking out into the dark, chaotic neighborhood, she brutally attacks an
alternate version of herself in a nearby yard, incapacitating her. Emily steals the woman’s coat and phone, effectively stepping into that alternate timeline, hoping it will be more peaceful and stable than the fractured ones she has endured all night.The next morning, Emily wakes up alone in the alternate house, seemingly having escaped the madness. However, her relief is short-lived when her phone rings. It is Kevin from the new timeline, calling in a panic because his version of Emily has just returned to the house, battered and confused. Smiling faintly at the horrifying realization that she has trapped herself in a reality she can never fully claim as her own, the film cuts to black, leaving Emily’s ultimate fate hauntingly unresolved amidst an endless maze of infinite parallel worlds.