On May 12, 1924, a park forest ranger notices rocks out of place near the mouth of the Kilauea Volcano. On Sunday, May 18, the ground splits open - rocks, fire, and ash fill the sky, and those who chose not to evacuate are in a fight for their lives.

Lucy Dillow, daughter of the local pastor, enjoys her days of ministering to Hawaii's friendly people and teaching their young in a simple one-room schoolhouse. When the order arrives to evacuate because of the uncertainty of the volcano, she decides to stay behind with her family in case they are needed, and to keep a journal of the volcano's activity. She doesn't expect to butt heads with a handsome rancher over the danger involved.

Jack Garrison is ranching land passed down from generation to generation. When the volcano threatens to blow, he refuses to leave his cattle to perish. Instead, he works to save them, herding them as far away from the volcano as possible. Once his livelihood is safe, he turns to helping those who need him; namely the beautiful daughter of a missionary who challenges everything he believes in.

This unlikely couple join forces as part of a team to warn the villagers of impending danger and find themselves falling in love despite the odds against them. Can they survive nature's fury and each other's differences in order to forge a future together?