The Midnight Caller von Scott Blade

Jack Widow is dragged down an international rabbit hole of espionage, conspiracy, betrayal, and a missing nuclear submarine.
Jack Widow is in New York City on his birthday celebrating, enjoying the tourist life.  An irresistible offer comes his way, and he ends up staying the night in one of the most beautiful hotels in the city, The Plaza. 
Things are going his way until he gets a mysterious midnight caller, a woman with a stimulating Russian accent and seductive voice, speaks, making a desperate plea for her life. She claims to need help. She claims that she’s being held against her will by a group of dangerous men. 
Suddenly, the phone goes dead. 
Who was she? Was her claim real?