Lady Elizabeth can't imagine who could have killed her tenant, Basil Thorncoft. A quiet, seemingly harmless man, he spent most of his time painting sunsets and seascapes near the village cliffs. He didn't like to talk about himself, but that doesn't mean he had a dark secret. Or does it? Meanwhile, when several mysterious strangers are spotted in town, the Housewives League is convinced there is an invasion of German spies. It's up to Elizabeth to quiet the rumors and uncover the truth about Thorncroft's death before Sitting Marsh becomes a sitting duck for more trouble...