Linfeng Wang, a former chief engineer at ICPO, who is completely infatuated with Lupin, has formed Wangtic, a security firm which prides itself on its new "L System", designed to thwart even Lupin's most clever disguises. Wang issues a challenge to Lupin to steal a unique coin, the Flowing Hair Dollar, from her heavily guarded Wangtic headquarters. Lupin accepts, but in order to disable the L System, he and his gang have to shut down its four power supplies at the same. While they rehearse their synchronization for the shutdown, Wangtic runs a high rotation advertising campaign with an annoyingly catchy jingle...