Three months ago, Cambrie Nguyen drove her car onto a remote bridge in Montana and jumped two hundred feet to her death. At least, that's the official version of the police. But her twin sister Lena doesn't believe it. She arrived at that same bridge in her dead twin's car, armed with a cassette recorder, to find out what really happened by questioning the highway patrolman, who discovered her sister's body. Corporal Raymond Rajsevik agreed to meet Lena at the scene, but his story doesn't add up. Why did Cambree make sixteen attempts to call 911 shortly before her death? Why did she send a mysterious message to her sister? Lena is ready to do anything to find out the truth.