...she is entrusted with a top-secret message to be delivered to the ominous Charles Briand.
Fast-forward half an hour, Sheila is chasing friends, foes, and old flames on the 14:52 to Exeter, as members of the Nuclear Justice Association attempt to arm the entire world with enough weapons to destroy it.
Can Sheila, the not-so-innocent bystander help diffuse the situation? Or will her utter lack of experience and necessary skills drag the mismatched team down?
Age recommendation: 12+
References to murder, violence and suicide.