On his latest expedition, Dr. Rick Marshall is sucked into a space-time vortex alongside his research assistant and a redneck survivalist. In this alternate universe, the trio make friends with a primate named Chaka, their only ally in a world full of dinosaurs and other fantastic creatures.
Dave Skylark and producer Aaron Rapoport run the celebrity tabloid show "Skylark Tonight." When they land an interview with a surprise fan, North Korean dictator Kim Jong-un, they are recruited by the CIA to turn their trip to Pyongyang into an assassination mission.
When Lou finds himself in trouble, Nick and Jacob fire up the hot tub time machine in an attempt to get back to the past. But they inadvertently land in the future with Adam Jr. Now they have to alter the future in order to save the past - which is really the present.