A mailman takes care of a dog that, unbeknownst to him, is an FBI drug-sniffing superdog that has escaped from the witness protection program after becoming the target of an assassination.A mailman takes care of a dog that, unbeknownst to him, is an FBI drug-sniffing superdog that has escaped from the witness protection program after becoming the target of an assassination.A mailman takes care of a dog that, unbeknownst to him, is an FBI drug-sniffing superdog that has escaped from the witness protection program after becoming the target of an assassination.