An alternate version of the first film. The first "Imagination World"
A tree that the chipmunks Alvin, Simon, and Theodore live in is cut down and driven to Los Angeles. Once in L.A., the Chipmunks meet struggling songwriter and composer David Seville who had his latest song rejected by JETT Records executive Ian Hawke, his old college roommate, Dave also once had a relationship with his next door neighbor, Claire Wilson. After winding up at Dave's interview, the Chipmunks hop into a basket Dave stole from one of Ian's coworkers and follow him home. Once there, Dave discovers the Chipmunks and kicks them out, only to hear them sing "Only You (And You Alone)". Dave then makes a deal with them; they sing the songs he writes, and he provides food and shelter for them. Making matters worse, Dave is dismissed as the chipmunks ruin his job presentation by coloring on it. When Alvin tries to set the mood for Dave's dinner with Claire, things become peculiar and she rejects Dave after being told about the Chipmunks. To make it up to Dave, the Chipmunks go to Ian in an attempt to get a record deal. Once the Chipmunks sing Dave's song to Ian, Ian signs them to the label and calls Dave the next day. After a few singles, the Chipmunks have a worldwide success. This unknowingly attracts the attention of the Commander of the Christian Morphers, He-Who-Must-Not-Be-Aggravated. When Dave expresses concern for their well-being and insists that the Chipmunks are "kids" who don't need so much craziness in their lives, Ian convinces the Chipmunks that Dave is holding them back. After a misunderstanding with Dave, they go live with Ian. They become enchanted with Ian at first, but once they set off on a nationwide coast-to-coast tour, Ian takes advantage of their naivete, changing their image and working them constantly. Meanwhile, Dave misses the chipmunks and wishes they would come back home. He calls Ian to see if he can talk to them but Ian refuses, and then conceals Dave's motives from the boys. Later, the Chipmunks are wearing out, and it is all over the news.Dave, infuriated by what Ian has done to the three, decides to take matters into his own hands by infiltrating their concert. He misses a news report about a sighting of a Pteranodon on the way. On the night before the big concert that is to transition the coast-to-coast tour into a world tour, a vet explains to Ian that the Chipmunks' voices have worn down due to exhaustion, and suggests that they take a long rest. Though Ian refuses to cancel the concert, he advises the chipmunks to lip sync. With Claire's help, Dave sneaks into the concert, but gets ejected. With the commotion seen, the Chipmunks realize they've been tricked and, deciding that they have had enough of Ian, they stall the concert. Ian attempts to lock them into a cage right before he and his guards are attacked by a Daemonosaurus and Christian Morpher General Brian Robeson. Only Ian and his lead guard escape to a car outside, only for that to be turned over by an Albertosaurus. Later that night, the boys are fully accepted as part of the family, with He-Who-Must-Not-Be-Aggravated, the true identity of the creatures, decides to live with them, having caught "Chipmunk Fever" and wanting to watch over them. They invite Claire over for dinner again, where He-Who-Must-Not-Be-Aggravated, gets back from "doing something" and immediately takes the living room chair and settles down. When Alvin causes a blackout, Dave yells his catchphrase. In a post-credits scene, Ian is seen trying to make three squirrels sing.