A man fakes his death in a canoe accident, his wife collects £250k in life insurance, and he hides in a secret passage for 5 years. The unbelievable true story of John Darwin.

We are traveling back to the early 1900s to meet one of the most prolific and cold-blooded female serial killers in American history: Belle Gunness. A seemingly respectable widow in La Porte, Indiana, Belle used lonely hearts ads to lure wealthy, unattached men to her farm, promising love and companionship.