[AftertheabductionandassumeddeathofMackenzieAllenPhillip'syoungestdaughter,Missy,Mackreceivesaletterandhasthesuspicionit'sfromGodaskinghimtoreturntoTheShackwhereMissymayhavebeenmurdered.Aftercontemplatingit,heleaveshishometogotoTheShackforthefirsttimesinceMissy'saccidentandencounterswhatwillchangehislifeforever.]