This film goes from shock and awe to aw, shucks way too abruptly. Memoir adapter and director Joel Edgerton continues in his horror milieu with Boy Erased (C+), exposing life in a gay conversion therapy center as a form of interior and institutional terror. It’s a bit of a low-key rainbow hued Cuckoo’s Nest or Girl, Interrupted and is extraordinarily effective until it isn’t. In the pro column is the protagonist, a preacher’s son magnificently played by Lucas Hedges, whose heartache and aim to please is palpable. He’s one of the great actors of his generation, and he sells a sometimes hackneyed narrative with dignity and verve. In the con camp are all adult characters: the ex-gay Grand Poobah himself played with little nuance by Edgerton and the conflicted parents played by Nicole Kidman (generally effective if a little treacly) and Russell Crowe (a career worst performance with stone cold lack of subtly). Told awkwardly with occasional flashbacks, there is genuine suspense in some surprisingly bleak moments; other times, the detached hero hovers emotionally above his melancholy surroundings, robbing sequences of conflict. There’s a through line of cautionary importance to this exposé of all-too-common reprogramming procedures. But the final act offers too tidy a resolution. More like goodwill erased.