With the docks of Distant Turtle City behind them, the challenge of the city's castle still lies ahead. Ancient dwarven samurai were the lords of that mighty estate, but now it has fallen to darkness. What secrets and horrors might be found there are disheartening enough, but with a city of the shadow dead at their backs, the adventurers have little choice but to put an end to Molo's corruptions once and for all. Come join the battle against legendary tortoise oni, stealthy giant mantises, corrupted beasts, undead half-dwarven guards, and even a rumored shadow dragon! WS4 Samurai's Fall is an adventure module in 1E & 5E formats for characters levels 6-9. This is Part IV of the White Ship Campaign.