A high school student named David Raskin stumbles upon his late father's old home videos and blueprints for a temporal relocation device in his basement. Along with his tech-savvy sister, Christina, and friends, Quinn and Adam, he decides to build the machine. After initial experiments prove successful, the group excitedly begins using the device to rectify personal mishaps and achieve their wildest dreams. They experience euphoric highs as their improved lives bring newfound happiness and opportunity.

However, as they continue to meddle with time, unforeseen consequences begin to unravel their reality. Each change results in increasingly dire ramifications that spiral out of control, forcing David and his friends to confront the dangers of altering the past. The group faces mounting challenges that threaten their relationships and future, revealing the perilous nature of time travel.