Majestic Thunderbolt (1985)

Two rival bosses of diamond smuggling outfits Tiger and Franco get into conflict over a very valuable diamond Tiger is an apparently conventional businessman Franco is a psychopathic playboy whose pride and lust know no limits and who murders his own mistress for her infidelity It is smuggled into Hong Kong by Richard who tries to make a deal with Franco but Tiger hears about this deal and sends in Philip a New York assassin to steal the diamond