"In Cold Water: The Shelter Bay Mystery" is a true crime docuseries that investigates the suspicious drowning death of Laura Letts-Beckett, a Canadian school teacher, during a fishing trip in the Rocky Mountains with her husband, Peter Beckett, raising questions about whether her death was a tragic accident or a calculated murder by her husband, the only witness to the incident; the series examines police investigations, interviews, and life insurance policies to unravel the mystery surrounding Laura's death.