After 18-year-old Darla Hawkins is caught shoplifting, she is sentenced to spend six months in the custody of former Marine colonel Mike Beckwith, who will act as her daddy and disciplinarian during that time. Mike is more than ready to be as firm as necessary, and when Darla doesn't obey him promptly during their first meeting he wastes no time in baring her bottom, pulling her over his knee, and spanking her until she's a very sorry little girl.

Darla quickly discovers that a spanking is far from the most humiliating punishment Mike is prepared to employ when she fails to do as she is told, and before long she has lost the privilege of wearing big girl panties. Her daddy putting her in diapers is more embarrassing than anything she has ever imagined, yet to her shame it also leaves her intensely aroused. Her shame only increases when Mike decides that some very special training is required to deal with her repeated disobedience, and she soon learns that even her most intimate places belong to her daddy.

Though his disciplinary techniques frequently leave her with blushing cheeks and a sore bottom, Mike's caring guidance and loving attention help Darla blossom in a way she never could have before, and she grows closer to him with each passing day. But will she be left on her own when her sentence is completed, or will her daddy find a way to keep his little girl at his side forever?