Canadian explorer and storyteller Jill Heinerth is one of the world’s greatest living cave divers, fuelled by an insatiable curiosity to explore the unknown “veins of mother earth”.

Jill has been involved in the most legendary and demanding cave diving expeditions of all time, from surveying the world’s longest caves in Mexico to discovering giant iceberg caves in Antarctica.

Juxtaposed with these hair-raising dives are intimate, candid interviews and animated flashbacks to her younger years that reveal a complex array of motivations for taking on these challenges. Despite how over 100 of her friends have perished in the depths, for Jill, each adventure in this dive odyssey is one step closer to becoming the woman she wished she’d met when she was a child.