A Simple Plan (1998)

When Hank, Jacob and Lou find $4.4 million inside a crashed plane in a nature preserve, they quickly come up with the plan to keep the money safe until the plane has been found by others and the dust has settled. But Jacob, Hank's brother, and Lou, a friend, do not behave the way they decided to. Lou, constantly in financial debt, wants his share soon and Jacob wishes to renovate their parents' farm. The trusty atmosphere between the unequal partners dissolves slowly, and intrigues are spun. Also, accidents start happening and when an FBI agent comes into town, looking for a crashed plane, Hank and his partners get into very deep water...