In The Most, a 1950s housewife takes to the pool and won't come out.

Everything changes for 12-year-old Samantha McGinty in the summer of 1969. Her father, Brick, stops fussing over his Chevy each weekend, no longer spritzing the windows with water and vinegar and wiping them clean with old pages of the Erietown Times.

As David Sibelius boils the lobsters for the annual dinner he hosts for his graduate students at the Boston Institute of Technology, his 12-year-old daughter, Ada, observes him with a sense of foreboding.