This is Book 4 of the Frostbite Series, before you read this, make sure you have read the three previous books! The 100 questions that had burdened Eleanor Flint has finally been answered, in not the greatest way possible, but it has also helped her in understanding her past better. Now she and Steve are back with the Avengers to take down remaining HYDRA bases, but this is an easy fix. What isn't easy is when Tony accidentally brings a new threat into their home that threatens the safety of the Avenger and possibly, the world.