Edward "Duke" White, a struggling father to five sons with three different women, has taken his own life by jumping over Niagara Falls. His ex-wife, Goldie, had been the primary caregiver to the boys, despite only being the biological mother to the first three. In his will, Duke leaves behind a series of cryptic messages and a large sum of money, which the boys soon discover is tainted by fraud. As they try to unravel the mystery of Duke's death, they learn that he took his own life to atone for past mistakes that will now lead to their own impending doom.

A Beginner's Guide to Endings
On a heart-wrenching journey, three siblings strive to rectify past errors and confront unfinished business as they face the harsh reality of their limited time left.