Retired Tokyo cop Kogoro (voiced by Rikiya Koyama) witnesses a former colleague murdered at their rendezvous point, and he heads up to Nagano to follow up on the dead man’s investigation. The Nagano police reluctantly accommodate Kogoro nosing around, but he forbids young Conan (Minami Takayama) from lending his considerable talents. The pint-sized Poirot manages to get on the scene anyway under the pretext of a visit to a nearby radio observatory. Add in the PSB also bugging the mini-Maigret, the vengeful father of a suicidal biathlete and the subtleties of Japanese plea-deal policy and, unless you’re a Detective Conan initiate, you will be thoroughly lost. The beautiful credits sequence, dashing around a hyper-real crystalline snowscape, caps off this instalment’s jazzy panache.