A Japanese super heroine lives in New York City and deals with endless crises -- when all she really wants to do is sleep with her boyfriend.

Unlucky assassin Ladybug is determined to do his job peacefully after one too many gigs gone off the rails. Fate, however, may have other plans, as Ladybug's latest mission puts him on a collision course with lethal adversaries from around the globe—all with connected, yet conflicting, objectives—on the world's fastest train.