has been consumed by a mysterious energy "Zone" similar to the Chornobyl Exclusion Zone. The Premise
Based on the search term and the context of browser-based games, the "story" you are looking for comes from a well-known genre of (often created with Flash or HTML5) set in the Naruto universe. Play Tsunade Stalker Game hit
Here is the typical storyline for the "Tsunade Stalker" game: has been consumed by a mysterious energy "Zone"