Jeffrey Hammond, a former mercenary, operates as a private detective alongside Robert T. Sturgeon, running their agency in New York City. He collaborates with ninja Ryu Hayabusa and Sturgeon to investigate a scientist conducting illegal genetic experiments that create bio-engineered mutants called "bionoids," designed using biological material from the entity Jashin. During a raid on the scientist's primary facility, Hammond employs firearms against the genetically engineered creatures. His standard armament includes a Glock 17 pistol—discharged once during the operation—and an Uzi submachine gun utilized for heavier combat in the genetic experimentation facility.