Set in the late 1800s, Samuel's Promise describes the love story of Samuel and Nancy Ruggles who were forced together by faith and the desire to serve God overseas in Hawaii. Samuel's friend Henry Opukaha'ia, a native Hawaiian, dies before he can lead the missionaries to his homeland, Samuel promises him on his deathbed he will indeed return to Hawaii to fulfill his friend's dying wish. Samuel has one problem—he's not married and the company will only accept couples to the group. Nancy Wells works in the office of the Foreign Mission School and she too believes God is calling her to serve overseas, but after her true love was killed years earlier, Nancy closed her heart to everyone but God, and learns she too must find a husband quickly if her dream is to become reality.