A family of three—Dana, Rita, and their ten-year-old son Kevin—set off on a camping trip to rekindle their strained relationships. Their tranquility is disrupted when Eric, a charismatic college student, ingratiates himself into their lives. Despite initial misgivings, the family lets their guard down around the seemingly harmless stranger, who soon begins to show an unsettling interest in psychological manipulation. Eric's invasive presence starts to sow discord, leading Dana and Rita to question their own instincts and their trust in each other.

As tensions escalate, Eric's manipulative tactics grow increasingly dangerous, pushing the family to the brink. Kevin, in particular, becomes a focal point of Eric's mind games, as the student seeks to exploit the boy’s vulnerabilities for his own twisted entertainment. The once-idyllic vacation deteriorates into a psychological battlefield where survival hinges on discerning reality from illusion, and the family's unity hangs in the balance.