Held captive by the mysterious Harley Sinn, Harley Quinn tries to learn the identity of her captor and what Sinn intends to do with her! But the most significant question of all is why Sinn has been conducting surveillance on the family members of the rest of the Gang of Harleys, and what does she intend to do with them?

Edna has just blown up Bolly Queen's family restaurant, assuming the Gang of Harley's dead, Edna and her team of Sinn-Dicates call Harley Sinn to report mission complete. Little did they know Bolly Quinn and Harlem Quinn noticed them seconds before the explosion, and they got the rest of the gang safely to the walk-in freezer where they survived the blast. The Gang then calls Coach and sneaks out an old speak easy tunnel.

Meanwhile, later across town Harley Quinn escapes her bonds and attacks Harley Sinn, but Sinn is saved by her Sinn-dicate.

Later, in Woodstock New York, the gang arrives at Coach's house where the gang learns that orphaned young, but rich. Coach tells them she learned Sinn's real name is Constance Brand and she had tried out for the Gang of Harleys and more important she found her hideout.

Back in Red Hook, the Sinn-dicate wants to be paid but Sinn's account has been frozen, so instead of paying them she kills her own henchmen. She then booby traps the base to explode and leaves with Harley Quinn's unconscious body.

Later the Gang arrives to find the dead henchmen and barely escapes the explosion. The escape only makes the gang angry and ready to get serious.