On its maiden run, the world's fastest bullet train is rigged with a bomb that will explode if it dips below 200 mph.

While working the night shift, Isabel witnesses a murder that makes her question reality.

Perpetually single Frankie decides to give up on men in favor of going all-in as a “dog mom" to her adopted dog, Tucker. But sparks fly when Frankie meets Jack, the veterinarian who rescues her dog from near death. They seem destined to be together, but there's one problem: Jack is already engaged.

Follows Brianna as she teams up with journalist Landon to uncover the truth about her father’s murder.