Haunted by guilt after dismissing a frightened colleague’s claims, a burned-out police psychologist uncovers a terrifying truth: the people they love are being replaced, and the invasion begins with the unborn.

SYNOPSIS:

Dr. Harriet Mercer, a weary police psychologist haunted by personal loss, is pulled into a disturbing case when a pregnant woman is found wandering alone at night, terrified and incoherent.

When she is taken to a nearby police precinct a man claiming to be her husband arrives and takes her away, supposedly to hospital, despite no one having contacted him.

The only lead the police have connects Harriet to the woman: Lila, a colleague and friend Harriet recently dismissed as unstable.

Lila had confided in Harriet that something was wrong, not just with her own husband, but with the partners of several women in her antenatal and trauma support groups. The men had become distant, emotionally hollow, subtly wrong. Some didn’t seem to sleep. Others felt unnaturally cold. One woman claimed her husband no longer reacted like a living person at all. Harriet, still carrying the weight of her own past pregnancy loss, attributed these fears to shared trauma and urged Lila to seek rest.

Now Lila is missing.

Teaming up with Detective Nathan Bailey, from the precinct Lila was taken to, Harriet retraces Lila’s final days, uncovering a pattern of disappearances among pregnant women across the city. Medical records have been altered or erased. Partners offer identical, rehearsed explanations. Surveillance footage glitches or vanishes entirely. As Harriet digs deeper, she becomes increasingly convinced that Lila was telling the truth and that she herself may have ignored the first clear warning.

The investigation leads Harriet and Nathan to a series of increasingly unsettling discoveries: abandoned homes scrubbed clean, traces of biological material that defy explanation, and individuals who move and behave like people, but aren’t. The turning point comes when Harriet infiltrates a sealed-off stadium and finds hundreds of them standing silently in the dark. When they all turn to face her at once, she realizes the scale of the invasion is far beyond anything she imagined.

As the city quietly falls under their control, Harriet loses contact with Nathan and finds herself completely alone. The truth becomes undeniable: whatever has taken hold is spreading through intimate relationships, targeting the most vulnerable, and using pregnancy as a means of replication or communication. The invasion has not arrived with violence.

It has grown slowly, silently from within, and it is already too late.

With no one left to trust, Harriet records a final message, confessing that she was wrong to dismiss Lila and warning anyone who might still be human. Then she hides the recording, hoping it will be found someday.

But when it is discovered, with Harriet long gone, the viewer listens without emotion and deletes it.

Outside, thousands move in silent unison throughout the city streets.

Humanity has already been replaced.