In the heart of a dense jungle, hidden within the ruins of an ancient fort, nine-year-old Jugni finds herself trapped in a web of danger and mystery. Kidnapped by a ruthless gang seeking ransom, Jugni’s fate seems uncertain. But as chaos brews within the gang, betrayal shatters their unity. Two of the kidnappers outwit the rest, making their escape with the ransom money—only to be relentlessly pursued by their vengeful accomplice, leading to a shocking twist of fate.

Meanwhile, Jugni, instead of succumbing to fear, discovers a way to break the wall. She thus moves from room to room and discovers some marks of crimes. In one room she fell asleep to wake up in a past world. There she forgets everything. Then the story tells her adventures there, how she comes back, how she finds out the proof of crimes, and how she, with the help of Grandfather's telepathy helps the police to catch the culprits.

Jugni and the Lost fortress mystery is a gripping mystery-thriller that combines suspense, time travel, and the triumph of courage over adversity. Written for children aged 12+ and young adults, this book is not only an adventure but also a lesson in bravery, intelligence, and perseverance. With an unpredictable plot, rich historical elements, and an unforgettable heroine, this novel promises to keep readers on the edge of their seats from the first page to the last.