On August 31, 2016, Kala Brown and her boyfriend, Charlie Carver disappeared. Her mom, Bonnie Newsom, says Kala’s friends realized something was wrong because she was not responding to anyone, and they alerted her.

“At first, I thought it was just them messing with me. I guess I wanted it to be,” Bonnie tells Dr. Phil in an exclusive interview airing Monday.

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But Bonnie says her daughter’s car was parked in front of her apartment and her dog and personal belongings were left inside, so she soon realized there might be foul play involved.

“Even though I knew it wasn’t right – she wasn’t contacting anybody, she wasn’t on social media – in my mind, I guess, as a parent wanting the best case scenario, I was hoping they’d went to the beach,” Bonnie says in the video above. “I just had to keep telling myself she’s OK. We can find her.”

WATCH: Woman Who Was Allegedly Kidnapped And Held Captive For Two Months Shares Her Story

On November 3, 2016, 30-year-old Kala was found alive, chained at the neck and locked inside a storage container on an isolated plot of land in South Carolina. Police say she was held captive by Todd Kohlhepp, a registered sex offender and local realtor who Kala said hired her to do odd jobs around his property. Carver was found a day later buried on the property.

WATCH: How Kala Brown’s Mom Learned Her Daughter Was Found -- And Alive

In an exclusive interview airing Monday, Kala tells her story of what happened inside the storage container, how she claims her boyfriend died and what she claims Kohlhepp did to her. And on Tuesday, hear what Kala claims her alleged kidnapper planned for their future together. Plus, Kala believes she wasn’t the first woman Kohlhepp held prisoner. Hear why she believes another woman came before her. Check here to see where you can watch.

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Kala Brown Tells Her Story Of The Day She Was Allegedly Kidnapped By Suspected Serial Killer Todd Kohlhepp