Manny the woolly mammoth, Sid the sloth, Diego the saber-toothed tiger, and the hapless prehistoric squirrel/rat known as Scrat are still together and enjoying the perks of their now melting world. Manny may be ready to start a family, but nobody has seen another mammoth for a long time; Manny thinks he may be the last one. That is, until he miraculously finds Ellie, the only female mammoth left in the world. Their only problems: They can't stand each other--and Ellie somehow thinks she's a possum! Ellie comes with some excess baggage in the form of her two possum "brothers"-- Crash and Eddie, a couple of daredevil pranksters and cocky, loud-mouthed troublemakers. Manny, Sid and Diego quickly learn that the warming climate has one major drawback: A huge glacial dam holding off oceans of water is about to break, threatening the entire valley. The only chance of survival lies at the other end of the valley. So our three heroes, along with Ellie, Crash and Eddie, form the most unlikely family--in any "Age"-- as they embark on a mission across an ever-changing, increasingly dangerous landscape towards their salvation.

In the near future, everything has changed. Basic human rights have become the rarest of luxuries. No one knows when this started but everyone knows how. The VXII, the deadliest virus ever created, spread like wildfire and decimated the majority of the world's population. The non-infected survivors now cling to life in four quarantined cities behind a wall. Shawn Kors and his brother, Jude, survived the VXII only to grow up in a squalid internment camp for orphaned children. Under the care of the militia, they were pitted against other children in backwoods death matches. Shawn, Jude, and the few who escaped became notorious for their incredible fighting skills. They have since parted ways. Shawn now makes a comfortable living as a janitor at the local medic station. He spends his days dreaming of curing the VXII. When Shawn discovers the discarded body of a fellow internment camp friend, he is forced out of hiding and pulled into a rabbit hole of conspiracy and violence. All signs point to Jude. With bounty hunters and the militia on his trail, Shawn races to find his brother before Jude executes an unspeakable action that will destroy them all. He chases Jude across a sprawling post-apocalyptic landscape to an abandoned laboratory. There he discovers the true nature of his world and the secret behind the white wall.

Two mutant brothers, Logan and Victor, born 200 years ago, suffer childhood trauma and have only each other to depend on. Basically, they're fighters and killers, living from war to war through U.S. history. In modern times, a U.S. colonel, Stryker, recruits them and other mutants as commandos. Logan quits and becomes a logger, falling in love with a local teacher. When Logan refuses to rejoin Stryker's crew, the colonel sends the murderous Victor. Logan now wants revenge.

Four guy friends, all of them bored with their adult lives, travel back to their respective 80s heydays thanks to a time-bending hot tub.