Blood Fever begins with a prologue during which a young girl named Amy Goodenough is aboard her father's yacht in the middle of the Mediterranean when she becomes witness to a band of pirates under the command of Zoltan the Magyar who board the yacht. Zoltan's men ransack the vessel and in the process murder Amy's father who was unwilling to part with his priceless possessions. When Amy fails to get revenge by throwing a knife at Zoltan and hitting him in the shoulder, she is taken prisoner, but swears she will one day succeed in achieving vengeance.