To help protect native species, wardens man an abalone checkpoint on the northern coast of California. With the black market value at roughly one hundred dollars each, wardens have their hands full stemming the tide of poachers. While wardens face off against a shark being illegally kept in a pet shop, a rookie assigned to the Los Angeles beat snares lobster poachers in Redondo. And later, wardens work together to bust a black market piranha operation.