The term "shadow plot" is defined in the dictionary as a "dark curtain" or a "sinister scheme concealed from view." In other words, it implies handling things in secrecy, as if aiming for the perfect crime—where only the effect, like a death, is noticeable.

"Of course, none of the real-life shadow masterminds have ever wrapped things up so cleanly," I said, tapping my fingers on the desk.

The mistakes they made could serve as reminders for me before and during any operation. The key lies in how they concealed the sins that lurked beneath those rare slip-ups.

After pondering for …