Jamie Forest, entering her second summer in her cabin by Lake Larissa, is planning a wedding to the love of her life, Jim Monroe. In a troubling reveal, Jim tells her about his older brother Eli, who disappeared twenty years earlier. Eli was a high school football standout and a strong swimmer. At his his graduation party, he went midnight swimming with friends and didn't come back. His body was never found. Did he drown? Or did he simply walk away from his life and family? With the backdrop of the Minnesota Northwoods threatened by drought and wildfire, Jamie is launched into an investigation to find out what happened to the high school hero.