Dave (Eddie Murphy) in a white suit looks like a polite middle-aged man. Although he always seems out of tune with this era and this metropolis in modern New York, who would have thought that this very real "man" is actually a humanoid spacecraft with many quarter-inch-high aliens living in its body. They came to Earth to seek ways to save their planet, but unexpectedly they first underwent a great test in adapting the spacecraft to life on Earth. After causing a lot of trouble, who would have thought that the spacecraft actually fell in love with a beautiful Earth woman Gina (Elizabeth Banks) on its own, and the aliens' deviated routes became increasingly difficult to adjust...