The Deep

Retired Army engineer Lars constructs a destructive device to test an idea and prove a point. The test is successful, and the project is archived while he starts working on his next project. When his device and all of its designs get stolen, he suspects local kids and thinks nothing of it. 

Emily from Germany and Swedish Niels are a well-educated environmental activist couple. They have recently returned from a project on saving ocean mammals on the other side of the globe. Together, they have the skill set required to assist in helping to enforce the stipulations of the Paris Agreement. Their assumed to be untouchable opponents are the Russian state and its multi-billion-dollar gas industry. They devise a serious threat, execute it exceptionally well, and play their cards to perfection. In the process, they virtually bring the largest European supplier of natural gas to its knees. Eventually, the deployment of their threat brings peaceful Sweden close to war.

This international plot develops in arctic Sweden, Stockholm, the island of Gotland, St Petersburg, and Brussels.