Kokoro quits being a detective to become an idol out of spite, then immediately hates it. Henriette has to fake a crime just to make Sherlock stop moping. The whole special knows exactly how ridiculous this setup is and leans into it completely, building comedy out of characters who care about each other's happiness more than they care about looking smart.
Kokoro abandons her life as a police detective to chase stardom as an idol, pushed by family pressure and exhausted by the thankless grind of detective work. The transition hits different than she expected. Long hours of rehearsals and performances leave her hollowed out, and she can't shake the feeling that something vital is missing from her new routine. Back at the precinct, Sherlock faces the weight of Kokoro's absence. Her partner notices the emptiness and decides action is needed. Henriette orchestrates a statue theft, carefully calculated to pull Kokoro back into the mystery-solving world she abandoned. The crime is bait designed to remind Kokoro where her real passion lies. This special balances comedy with genuine sentiment as it examines the gap between chasing what looks good on the surface and actually doing what fulfills you. It's a character moment dressed up as a heist, asking whether Kokoro can admit she made the wrong choice and find her way home.