Friday morning a fire started at Denny's located at 1803 Edgewood Road in Edgewood, according to the Bel Air Volunteer Fire Company twitter feed.
The first firefighters on the scene saw flames coming from the back of the building, according to the twitter post by spokesman for Harford County Volunteer Fire and EMS Association.
The fire was controlled within 45 minutes and one person was taken to a local hospital for treatment of smoke inhalation.
The cause of the fire has not been determined, ExploreHarford.com reported.
Check out video of the fire above. Be advised there is some adult language.