What is Lum Lee searching for in the novel, Finding Moon?

Lum Lee is an elderly man of Chinese extraction who lived until recently in Vietnam. Moon first met Lee in Los Angeles when Lee contacted Moon about an important package that Ricky was to deliver to him on the flight that crashed.

Moon infers that Lee is shipping some sort of contraband, either guns or drugs, but as the novel unfolds, and Moon meets Lee again in Manila and goes with him to Vietnam, Moon learns that Lee, a devout Buddhist, is interested only in locating his family's kam taap, a container filled with the bones of his ancestors that Ricky had agreed to find and deliver.