In 1974, young Stasi recruit Lars is sent to West Berlin to seduce middle-aged single mother Lauren, who works in a British-American intelligence office.

Lars finds a way to break the ice with Lauren at the café she frequents; Klara develops a troubling side effect from her training regimen.

A mishap at the bakery sends a drunken Tobias crying to Axel; Lauren develops cold feet, so Lars must adopt a more aggressive approach.

Gregor recruits an eager young worker at the factory; Axel leaves a message for the tunnelers; Lars takes on a new identity to get close to Sabine.

Lars gets invited into Sabine's family home; Juliane tells her father about Klara's symptom; Tobias is interrogated by the Stasi.

Sabine's father becomes wary of Lars during dinner; Duncan tries to reconcile with Axel; Sabine spots an inconsistency in Lars' life story.