Scrat is still trying to nab the ever-elusive nut and maybe finding true love; Manny and Ellie await the birth of their mini-mammoth; Diego the saber-toothed tiger wonder if he's growing too 'soft' handing with his pals; and Sid the sloth gets into trouble when he creates his own makeshift family by hijacking some dinosaur eggs. On a mission to rescue the hapless Sid, the gang ventures into a mysterious underground world, where they have some very...

Emmet, an ordinary, rules-following, perfectly average LEGO minifigure is mistakenly identified as the most extraordinary person and the key to saving the world. He is drafted into a fellowship of strangers on an epic quest to stop an evil tyrant, a journey for which Emmet is hopelessly and hilariously underprepared.