Billy said he pulled over to ask the girl what was wrong and she replied: "My partner has dumped me here, he's taken my phone, cards and I only have $15".
"She was bawling her eyes out and it looked like she was in complete shock."
The couple agreed to drop her in Tirau and contacted the police as soon she hopped in the car.
"She continued to sit and sob in the back. Then, just before we were about to take off we saw a car heading towards us swerving all over the road, over the yellow line causing oncoming traffic to swerve," Billy said.
"The guy got out of the car, sculled his drink then threw it at our car."
Meanwhile, Billy said the woman was screaming: "'It's him... please don't let them take me I'm scared they are going to kill me'."
"My instant reaction was to get out of there fast. I was led on a 160km/h chase as the vehicle tried to run me off the road on several occasions," he said.
"If he had managed to have hit us at that speed, we both would have been dead."
At the intersection connecting SH29 and SH1, the other driver cut Billy off forcing him to slam on his brakes.
"It wasn't until I came to a complete stop that I realised the girl had opened the door and jumped out of the car.
"The two males very aggressively ran out of the vehicle carrying alcohol bottles and weapons. They grabbed her and threw her in their car."
During the car chase, Billy and his partner had been on the phone to 111.
"I then sped off and was followed by the car for approximately four minutes. The driver then turned around and disappeared. The 111 operator stayed on the phone until we arrived home."
A police spokesperson said they were making inquiries. Charges were being considered, the spokesperson said.