In England, Lord Marquess hosts a party for railway enthusiasts on his vast estate which includes a replica of a railroad. Zenigata convinces NYPD's Inspector Queen that Lupin will be there to steal a valuable historic railway ticket so he attends the party.

Timing matters when the CEO of Wangtic Securities challenges Lupin to test the L System, her purportedly Lupin-proof security system… but what does the 'L' REALLY stand for?