Dancing Demon in the Noh Mask Mansion (Part 1) The episode begins with three Noh masks museum employees conspiring to murder the museum curator. Detective Mouri, Ran and Conan show up at the museum explaining that they received a letter warning them that the museum curator's life is in danger. They meet the museum curator, his personal nurse, and his businessman acquaintance in the garden. Soon a heavy pile of logs roll out of the shed and almost crush the group. Other "accidents" occur until the businessman is poisoned and dies.