In the summer of 2012, Lisa Knight was a 29-year-old mother of four, and her life was in a difficult place.

Addiction and her struggle to get clean and stay clean weighed on her.

She had been battling her demon since she was a teenager.

The Petite green-eyed blonde was trying to get things right to get herself back to center,

to make sure that her children, who she did not have custody of, were taken care of.

It was June 8th when she last spoke with a friend. It was 1030 at night.

Lisa was tearful, asking her friend to pick her up.

Then Lisa changed her tune and ended the call, and Lisa Knight would not be seen or heard from again.

Come with me to a warm summer night in northern Michigan, to the sunrise town of Alpina where after an evening spent with her ex-husband,

Lisa Knight, a mother, daughter, and friend vanished forever.

I have a fascination with Alpina. In the early part of the 20th century my great grandparents moved there taking jobs with the Alpina public schools. My great-grandfather would teach school in alpina from the early

part of the 20th century through the 1960s. It's the little town on Lake Huron where my grandfather grew up, which gives it a special place in my heart,

but I've never actually been to Alpina.

Perhaps this summer I will remedy that and travel there.

Perched on the edge of Lake Huron,

Alpina is known for breathtaking sunrises over the big lake,

and the lakefront communities that dot Lake Huron are known as the Sunrise Coast.

Alpina is a tourist town. Visitors flock to the area for lake access, fishing, hunting, boating, hiking, and all the amazing

outdoor activities Michigan has to offer.

It's also a working town, known for a limestone quarry and a factory that makes concrete block machines.

It's a small community with a population of around 10,000 people, which of course swells each summer with the arrival of tourists and people moving

into summer homes and cabins. The population swells again in the fall with the arrival of hunting

...