Anna gets thrown 28 years into the past on her 14th birthday and has to solve why it happened before she can go home. She's not a detective, but the girl she meets is obsessed with becoming one, so they start investigating together, and the mystery isn't about magic or monsters. It's about why someone needed to send her back to 1999 in the first place, and every case they solve might be a piece of something much larger. Precure has always been about girls saving the world, but this one makes you solve it with them. You don't get the answer until you've looked at every clue the same way Anna does.
Anna Akechi wakes up on her 14th birthday in 1999, twenty-eight years before she was born. A magical encounter with Pochitan, a mysterious fairy, yanked her backward through time, and now she's stranded in Makoto Mirai Town as it existed nearly three decades ago. Everything feels both familiar and foreign. When a string of clever thefts plague the town, Anna meets Mikuru Kobayashi, a sharp-witted girl obsessed with detective work. Together they realize these aren't random crimes: a phantom thief organization is systematically targeting precious items in ways that seem impossible. The only way to stop them is to transform into Precures and fight back. Anna seizes on a desperate hope: solving these mysteries might unlock the secret to sending her home. As she and Mikuru combine detective work with magical combat, they uncover deeper patterns in the thefts. Each case brings them closer to understanding why Anna was sent back in time, and whether she can actually return.