Billy, a single mother of two, is led into a macabre underworld while her teenage son, Bones, discovers a secret road leading to an underwater town. Both Billy and Bones must dive deep into the mystery if their family is to survive.

An elderly couple, reminiscing about their long-lost youth, comes across an advertisement for a new technological invention that promises to reverse the aging process. Intrigued, they pay a visit to the scientist who invented it, but things don’t go as expected.