Chapter 20 - The Unseen Shadow Still Lurks

On a quiet Sunday afternoon while walking along the neighborhood park with Toby, my phone buzzed with an unknown international text message.
I glanced down at the glowing screen, expecting spam or a telemarketer notification.
Instead, a single photograph popped up on the display showing my front doorstep from across the street.
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A mysterious silver key was resting neatly on our welcome mat, accompanied by a handwritten note that made my blood run cold.
“You won the battle against an amateur, Elena, but the real game in Zurich hasn't even begun yet...”