The Florida Highway Patrol says the crash happened Sunday afternoon just after 5 pm as a Hyundai drove south on Atlanta street less than a mile from Quincy.
Troopers say the car crossed the center line and plowed head-on into a Chevy SUV...and caught fire.
The three people in the Hyundai died at the scene... 27-year-old Omar Sanchez, 22 year-old Victor Martinez and one-year-old Melani Velazco...all of Quincy.
The driver of the SUV...35-year-old Pamela Henry was taken to Tallahassee Memorial...she's listed in serious condition.
Troopers said 16 year-old Daniel Henry had critical injuries.