| Director | Seth Gordon |
|---|---|
| Budget | $35 million |
| Box office | $175.4 million |
In Denver, a man named Sandy Patterson is tricked into buying phony identity theft protection from con artist Diana over the phone and he reveals all of his personal information. At work, after clashing with his boss Harold Cornish, Sandy receives a call mentioning that he has an appointment at a salon in Florida. Confused, he ignores it when co-worker Daniel Casey suggests that they and others quit and start their own firm. Sandy agrees to join them.
When paying for gas, Sandy's credit card is declined, and the clerk cuts it in half. The card company says that Sandy spent thousands of dollars in Florida, and he is arrested for missing a court date there. At the Denver police station, detective Reilly eventually determines that Diana stole Sandy's identity.
The police ask Daniel, now Sandy's boss, about his alleged possession of drugs. Sandy's name was used to buy drugs from someone named Paolo. When the cops say that they can only do something if the identity thief is in Denver, Sandy offers to retrieve her and convince her to clear his name.
At the salon in Winter Park, Florida, Sandy confronts the other 'Sandy' aka Diana, who steals his rental car. Finding her address in her abandoned car, he investigates her house, which is full of merchandise and stolen credit cards. The pair scuffle; before Sandy can handcuff her, criminals Marisol and Julian burst in, angry that Diana gave Paolo bad credit cards.
After Sandy and Diana escape, he mentions his plan to restore his reputation, and she agrees to help. Meanwhile, a skiptracer is dispatched to track down Diana for a bounty. Because their IDs are identical, airline flight is impossible, so they travel by car.
The skiptracer eventually catches up to the pair, capturing Diana. A chase ensues; she knocks him unconscious, and Sandy rams his van off the road. They take the skiptracer's van, then tie him up in back. When it overheats, they continue on foot through the woods.
Sandy discards his pants after finding a snake in them, then Diana accidentally knocks him unconscious when another bites his neck. Sandy wakes at a bus station; Diana carried him until she flagged down a truck. As the next bus to Denver leaves in three days, Sandy uses money hidden in his socks to buy a $200 car. Meanwhile, Marisol shoots the skiptracer, and the criminals continue their pursuit of Sandy and Diana. For gas money, the pair con an accounts processor in a bank and steal Cornish's identity to create new credit cards.
In St. Louis, the two share dinner, and Diana admits that she does not know her real name. The accounts processor enters with cops, who arrest them both. Diana uncuffs herself in the back of the police car, breaks the back windshield, and escapes with Sandy. The skiptracer shoots Marisol and Julian, finds Diana and Sandy on the highway mid-escape, and hits Diana with his car. Sandy comes to her aid, but Diana revives and defensively strikes him in the throat.
As Sandy and Diana escape, the skiptracer is arrested by the police alongside Marisol and Julian. The pair get to Denver where Diana has dinner with Sandy's family and reconciles with them. That night, Sandy and his wife secretly agree not to turn her in even if it means that he will lose his job.
The next morning, Sandy finds Diana gone and a note that apologizes for the trouble she caused. Sandy prepares to quit his job, but Daniel shows him that she is meeting with the police in an office. Diana is later taken away in cuffs, and Sandy is no longer part of the investigation.
One year later, Sandy celebrates another birthday, this time with his third child. The family visits Diana in prison, and he presents her with a birth certificate that reveals her real name as Dawn Budgie. Diana then hugs Sandy and goes inside, but when a female guard antagonizes her, she punches her, and another guard stuns her with a taser. As Diana recovers and walks back to her cell, Sandy watches, shocked.