Iris is sinking. As the summer of 1974 begins, she must grapple with the events that have lain dormant since the previous summer when her brother, Scott, drowned in their neighborhood lake. On her watch.
While Iris flounders with the weight of her guilt and grief, she seeks redemption from her family and yearns, in particular, to repair a strained relationship with her sister, Liz. But new developments threaten her efforts, forcing her to navigate the turbulence of the present summer while reckoning with the emotional trauma of the past.