Frank left his life as a soldier behind and wants to rebuild his life in Brandenburg. He is on his way to meet his daughter, Lily, after a long time of not seeing her. As he stops at a gas station he meets Andreas, who needs a ride to Berlin. Reluctantly, Frank agrees to take Andreas with him - unaware of the consequences.

Emerald Green is the stunning conclusion to Kerstin Gier's Ruby Red Trilogy, picking up where Sapphire Blue left off, reaching new heights of intrigue and romance as Gwen finally uncovers the secrets of the time-traveling society and learns her fate.