Solver (2017)

Plot

Luke, a young New Yorker, is thrown into a mystery when his grandfather vanishes under suspicious circumstances, leading authorities to declare him dead. At his grandfather's secluded cabin, Luke discovers a trail of perplexing clues and challenging puzzles. Teaming up with a former love and an eccentric companion, he races against time to decipher the enigma, all while uncovering a sinister secret lurking beneath the surface. As they dig deeper, the stakes rise, and the danger intensifies, pushing Luke to confront the truth about his grandfather's disappearance.