Penny is excited about the mysterious story she receives for the Penny Dreadful, however, when the story is published, she’s shocked to discover that it describes a recent crime. More stories follow from the anonymous author containing further sinister crimes and hinting at more to come. With the police perplexed, and all of London living in fear, Penny faces a race against time to track the elusive author down. Can she find him and put a stop to his terrible crimes before his story reaches its chilling conclusion?