A coming of age story about learning to let go and the wonders of travel, Sam O'Sullivan's The Wind in the Underground is a moving examination of the unique nature of sibling relationships. When the youngest brother returns from overseas, four siblings come together to decide the fate of the house they grew up in. As the past and present collide, the line between the two starts to blur and their younger selves reappear bringing with them unresolved childhood dynamics and exposing the complexities of their family bonds.