The Final Mission: Missionary Kids

Missionary kids and brother and sister Derek and Jolie are grown now, with families of their own. Then a mysterious friend of their recently deceased dad shows up seeking volunteers for a mission he claims could help "hundreds of millions, maybe even billions of people."
Burned out from the stresses of the Corona Virus lockdowns and their impact on his business, Derek welcomes the opportunity. More cautious than her older brother, Jolie begins to have doubts.