Following an unspecified global catastrophe, a family has found shelter deep within a salt mine. The father’s background in the energy industry allowed them to maintain a comfortable and well-equipped existence underground. Surrounded by reproductions of works by Reubens and Rembrandt, Michael Shannon, Tilda Swinton, and George MacKay have raised their son with assistance from her friend Bronagh Gallagher, a doctor (Lennie James), and their gay butler (Tim McInnerny). Their days are filled with disaster preparedness drills and rearranging their home, while the son writes a memoir intended for his father. This work blends an environmental history of the world with a somewhat unusual tribute to his father's efforts to provide affordable energy for everyone. Then, unexpectedly, a young girl (Moses Ingram) arrives, creating a dilemma for the family. Should they allow her to stay, or send her away? Her presence threatens to disrupt a household where underlying issues from their past—largely forgotten during their twenty-odd years of subterranean life—seemingly lie just beneath the surface. There's also a significant amount of singing; in fact, with one exception (Ingram), the cast isn’t particularly skilled at it. However, this doesn’t detract from the experience because the score by Marius de Vries and Josh Schmidt incorporates elements ranging from Rachmaninov and Gershwin to Lloyd-Webber, Rice, Pasek & Pau. Once you adjust to MacKay's occasionally strained high notes and Swinton’s competent but unremarkable vocals, it becomes quite entertaining. Gallagher consistently brings energy to the narrative, and McInnerny knows how to exaggerate his performance effectively (similar to his role in “Gladiator II”). The film jumps between timelines, though not drastically, creating a peculiar effect as characters seem to vanish at the conclusion of scenes. MacKay is the standout performer, delivering a portrayal that evoked Luke Treadaway’s Olivier award-winning stage performance as “Christopher” from "The Curious Incident of the Dog in the Night Time." His character's journey into adulthood involves elements of mild autism, a close attachment to his mother, and his own developing desires. The film is lengthy, with moments that are uneven, but generally it moves along smoothly, presented in a very theatrical style. If you’re seeking something that pushes actors beyond their usual roles, this might appeal to you.

Source on TMDB