神秘的顾客埃勒里是个超级侦探。这天,他到柯利的宠物店,本想买一条狗,却被柯利说的另一桩事给迷住了。柯利说有一个名叫尤菲米娅的顾客,她身体瘫痪,是个并不爱猫的老太太。可最近,她每个星期都会打电话到宠物店买一只黑猫,点明要和卖给她妹妹的那只一模一样。尤菲米娅有个妹妹叫萨拉安,因为尤菲米亚生活不能自理,就请妹 Mystery customer Ellery is a super-detective. This day, he went to the Currie pet shop, wanted to buy a dog, but was another Cole said something fascinated. Curley said there is a customer named Euphemia, her body paralyzed, is a cat does not love the old lady. Most recently, she calls the pet shop every week to buy a black cat, pointing out that she wants to sell her sister exactly the same. Euphemia there is a sister called Sara Ann, because Euphemia can not take care of themselves, please sister