Lost & Found (2016)

Sent off to spend the summer under the care of their uncle on an isolated island, Andy and Mark, two young siblings, uncover the intriguing history of their missing grandfather, who was once the owner of the island. His disappearance left behind a tantalizing mystery – the whereabouts of a vast fortune known only to him. The brothers embark on a journey through the island's enigmatic past, unraveling clues to a complex treasure hunt devised by their grandfather. This hunt promises not only immense wealth but also the potential to mend their fractured family ties, provided they can decode the mystery in time. However, malevolent forces lurk in the shadows, determined to thwart the boys' pursuit of the riches. Through this thrilling escapade, Andy and Mark realize that familial bonds hold more value than material wealth, and that some long-buried family secrets are destined to resurface.