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"Billy ze Kick" is the nickname of a character in a bedtime story, told by a French police inspector to his little daughter. For the purposes of the plot (it can't possibly be in the interests of proper child psychology), Billy is a make-believe serial killer! Shortly afterwards, three young girls turn up murdered. The unknown killer leaves behind a cryptic note, signed--you guessed it-"Billy ze Kick". Next time, the Inspector should stick to Curious George or the Poky Little Puppy.