What's wrong with this story?

After being kidnapped, Kimizuka, Natsunagi, Saikawa, and Charlie have learned the truth about Siesta's death...or have they? A girl who looks just like the deceased appears and informs them that the footage they've been investigating contains an error. As they hunt for an answer to a mystery that even Siesta couldn't uncover, the group will learn what it truly means to inherit the legacy of an ace detective. Though the detective may already be dead and the truth of her passing revealed, it's still too early for the epilogue...