The Lockport's Lament, a leviathan hunter, has just had a new engine installed at great expense. The owners, the Gravedens, are hoping that this will turn their fortunes around and they'll finally be back to the upper echelons of society that they once dwelled in. The Iruvian embassy has other plans and has hired the Ghost Leaves to conduct a little bit of industrial espionage: Get in, photograph the engine, and get out. With the leviathan hunting fleet being essential to the city's survival, they are some of the most protected places in the city. But, taking a photo isn't too difficult, right?