There is an a cave-in at Misty Depths Catacombs, Wyoming and Renee Bonnet finds herself stranded with a broken ankle and two strangers, Lem, a business man and a runaway teenager, Courtney. The cave is the catalyst but the events depend on the new catalyst, Renee, who finds herself drawn into the lives of her companions

Catalyst is a gripping action story of three people trapped in a cave together. They learn to trust and depend on each other not knowing whether they will survive the ordeal or not. It is a romantic drama that combines the sheer force of nature with the frailty of human emotions, greed, jealousy, passion, companionship and love.

This is a rescue story that does not stop when the victims are rescued but continues, as real life does, to mould new lives for the lonely characters.