“ I see you're shocked. Well, so was I when the pirates dragged me in here. I thought they were going to kill me. But Maerhen is a very religious man, so he treated me well. He did keep me trapped down here, but never once did he try to hurt me. Even after the pirates all fled from the hideout, the guard made sure to bring me plenty to eat and drink every day.”
—Law, in a conversation with Katri
Fifteen years prior to the story, Law encountered Zachariah in a forest located in Salia and was entrusted with the young Princess Maria. Afterwards, he gave her the name "Katri" and raised her as his own daughter. Early in the game, Law and Katri decide to travel to the Temple of Mars in order to leave her in the care of Eisenbaha. However, their ship are attacked by the Isla Pirates led by Maerhen and they are separated as a result. Law is killed by one of Maerhen's men and his body is possessed by the White Master Morse.
At the end of Map 13, Law meets Katri with the help of the deeply religious Maerhen, who treated him well due to his status as a priest. During the course of Holmes's story, he reveals the history of Lieberia and the deities to him. In the ending, Holmes reveals that Law is actually Morse and asks him when he intends to tell the truth to Katri.