While in his teens, Donny fathered a son, Todd, and raised him as a single parent up until Todd's 18th birthday. Now, after not seeing each other for years, Todd's world comes crashing down when Donny resurfaces just before Todd's wedding.
A year after his father's death, Oskar, a troubled young boy, discovers a mysterious key he believes was left for him by his father and embarks on a scavenger hunt to find the matching lock.