Attempting to meet up with friends, a woman is glad to welcome a stranger into her friend circle with several other friends of hers, but when the stranger begins making statements about their past history together kidnaps her to show that dark side of their relationship to her by force.
This was a fairly impressive and enjoyable genre effort. The psychological mind games at the center of the film are quite fun, using a genuinely unnerving pretense for everything with the insistence on misidentifying her to get into their past history and relationship which serves as the excuse to inflict a series of psychological-based tortures upon her to get to the truth. The reluctance and failure to do so is what allows everything to continue, with the physical and mental challenges making for a somewhat uncomfortable viewing not knowing whether or not the unhinged nature of everything will truly break loose as the harrowing backstory that ties everything together as her fractured mindset to set everything in motion makes for a fun time as the series of twists and reveals that fill in the gaps of what's going on work incredibly well. That's a massive help as the initial setup of the mistaken identity and holding captive seemingly is a massive flaw. The fact that she wants the other girl to admit to being the long-deserted friend she used to love and the failure to do that in a way makes little sense as there's little motivation for why she would believe her captive is the person she claims. That makes the interactions here somewhat repetitive with very little difference between their scenes together as we're trying to understand what the point of everything is about. While that gets resolved in the finale and the main storyline is resolved in a cohesive manner, the frustration does make for a somewhat problematic time watching until then, and with the whole thing relying on the least physically intimidating one among the group to try to keep them under her control it has some slight issues.
Rated Unrated/R: Graphic Language, Violence, Brief Nudity, and intense themes of sexual assault.
