Private detective Kosuke Kindaichi is summoned to a remote part of Japan by one of the attorneys of a rich businessman who has recently died. The attorney is distraught because he believes that the dead man's will is sure to set off a ferocious battle amongst his heirs, most of whom hate each other. Almost immediately after Kindaichi's arrival the lawyer is murdered, and the detective soon finds himself enmeshed in the family's history of bitterness and deceit as more bodies begin to pile up.
