Kate Humble joins a team of geologists on a journey right to the heart of one of the most active volcanoes in the world. On the island of Tanna in the Vanuatu archipelago lies Yasur - a volcano that erupts constantly, firing out red-hot lava bombs and showering the island in thick black ash. To discover whether another devastating eruption might happen, the team needs to collect a lava bomb the minute it is hurled from the crater. As they prepare for their death-defying mission, Kate explores the island and discovers how the volcano shapes the lives, traditions and beliefs of everyone who lives in its shadow.

Kate Humble joins a team of geologists on an awe-inspiring adventure to Ambrym in the Vanuatu island chain. Here, she undertakes an arduous journey to Marum - a volcano containing one of only five lava lakes on the planet - abseiling right to its heart to discover if another major eruption might be imminent. Along the way, she discovers how the volcano has shaped the customs and traditions of the islanders and discovers what it really means to live each day on the slopes of an erupting volcano.