Microbiologists Ross Roundtree and Rebecca Sweet (introduced in Dionne's first book, FREEZING POINT) are studying Chitan, a long-dormant volcano in Chile. A film crew arrives because they've been tipped that the volcano may begin erupting and they want to get footage.

A Nobel Prize winning physicist decides to "help" the earth by controlling global warming through geo-engineering. Using the Chilean volcano, he puts a plan in place that would ultimately block sunlight from reaching the earth -- and possibly cause unforeseen repercussions.

Dionne has written a second successful eco-thriller in BOILING POINT, which highlights the very real struggle to find some agreement and solution for the challenge of global warming.