Yamato's eye injury isn't just a plot device, it's the emotional hinge the whole movie turns on, forcing you to question what he's willing to hide and why. The supporting cast finally gets real weight here, their relationships grinding against each other in ways that land harder than Conan's usual deductions. This is a Detective Conan film that remembers the people matter more than the puzzle.

In the 28th Detective Conan film, a researcher is attacked in Nagano's Yatsugatake Mountains, and Nagano police detectives Kansuke Yamato and Yui Uehara take up the case. The investigation is complicated when the old injury to Kansuke's eye starts acting up, suggesting a darker link to the crime. Meanwhile, a former colleague of Kogoro Mouri is murdered after reopening an inquiry into the incident that scarred Kansuke's face ten months earlier. Teaming up with Amuro and Kazami, and backed by the Nagano police, Tokyo investigators and the Public Security Bureau, Conan works through the winter cold to uncover the truth behind that incident and the murder and attempts on lives that follow.