They make it to Cloud Cuckoo Land to organise a meeting with all the Master Builders. Emmet gives a terrible motivational speech, causing everyone to give up and lose hope. As they are leaving, Bad Cop and his team show up (he had been tracking Emmit) and start to capture all the Master Builders.
Batman rescues Emmet and Wyldstyle, and together with Vitrvius, Unikitty and Benny the 1980s spaceman they build an underwater spaceship and take to the waves just in time. Soon enough though it begins to break up, and all that is left is Emmet's double decker couch. The Pirate swings by and picks them up after Bad Cop stops hunting for them.
Emmet's ideas are so bad, or so bland, that it just might work to get them into President Business's lair. He decides to build a transport ship just like all the others - but they need a hyperdrive. At that moment, the Millennium Falcon flies by. Batman hitches a ride, but tricks them and steals the hyperdrive for his friends.
Their mission is now underway to stop the Kragle. Bruce Wayne delays the President, while the others make their way to the top of the skyscraper. Pirate helps Benny disable the shields, but Bad Cop shows up again and everyone is captured.
Vitruvius is finally defeated by Lord Business, and as his decapitated head is still alive, tells Emmet that he made it all up.
Lord Business finally manages to cut the 'piece de resistance' off the back of Emmet and releases the Kragle! The top brick-block of the skyscraper takes off, and all the lego citizens are attacked by a robot army, sticking them together with the Kragle super glue.
Emmet is attached to a battery that will ignite a bomb to destroy all the Master builders. To save the others, he rolls and then falls out the window of the skyscraper into a void. The Master Builders are saved.
Lucy/Wyldstyle has a plan. She gets herself onto live tv and announces to every citizen that to stop Taco Tuesday, they need to be unique and build random things -- to start Freedom Friday ...but still on a Tuesday!
Bad Cop turns Good Cop when he was ditched by his old master, and helps the crew escape.
Meanwhile, Emmet is lying on the floor - in the real world. He meets his master - a young boy. Then the boy's father, Will Ferrell, stops him having fun with his toys. He grabs the super glue and starts to stick pieces together permanently. The boy screams.
Emmet manages to flip himself off the table, where the boy picks him up and sends him back to his world through a void tube. He is now a Master Builder, but is soon captured by Lord Business again.
The father soon sees the creativeness of his son, and his own selfishness. They hug.
Lord Business then apologises to Emmet and he's a hugger too. Then he puts the Piece de Resistance onto the Kragle.
Emmet and Lucy get together. Bad Cop meets his parents. Father and Son play together ... but then it's announced that the boy's sister should also join them ... with her Duplo!