Thieves entered an unlocked house in Holton le Clay over the Bank Holiday weekend before stealing a car parked on the driveway as the owners slept.
Lincolnshire Police say the theft happened sometime between 11.30pm on Sunday and 5am on Bank Holiday Monday at a house in Pelham Road in the village.
Once inside the offenders stole the keys to a black BMW convertible which was parked on the driveway.
The car was later recovered in Grimsby.
Police say that the property was unlocked at the time of the theft and are urging people to be mindful of the importance of locking all windows and doors, even when you are inside your property.
Anyone with information should contact Lincolnshire Police on 101 quoting incident number 124 of May 27.