A widowed father, Tom, and his two teen children, Kevin and younger sister, Annie, find themselves trapped in a parallel universe when their jeep falls into the time portal while exploring the countryside. Together, they must learn to survive in this strange new world filled with dinosaurs, monkey-like people, and aliens.
After the death of his wife, Danny enlists his best friend and his brother-in-law to help raise his three daughters, D.J., Stephanie, and Michelle.
The story of Kevin Arnold facing the trials and tribulations of youth while growing up during the 1960s and 70s. Told through narration from an adult Kevin, Kevin faces the difficulties of maintaining relationships and friendships on his enthralling journey into adulthood.