The Lake Effect (2016) online

Four childhood friends - Nate, Jess, Maria, and Greg - are home from college for the summer and venture to the old Michigan lake house for a weekend getaway. Tensions arise when Jess brings her new boyfriend Alex along for the trip. Nate was hoping it would be just like it was when they were kids, but everyone seems to be on different agendas. When the real reason Maria and Jess wanted to come up to the lake house is revealed, a shocking discovery in the lake leads to the unraveling of this once close-knit group of friends