'Sweden's Fritzl': The woman held captive in an underground bunker tells her terrifying story.

Julie* was completely charmed by an American stockbroker who was living in London.

They met up in her Stockholm flat one day in early September. She remembers how he stared right into her eyes “the whole time” while they had sex, something she thought was unusual.

When he came over again two days later, they drank champagne and he fed Julie chocolate-dipped strawberries.

She didn’t notice that some of the strawberries were marked. They were the ones laced with Rohypnol.

The charming stockbroker was actually Martin Trenneborg, a 38-year-old Swedish doctor, who police claim spent more than five years constructing the dungeon to which he transported the drugged woman.

Dubbed ‘Sweden’s Fritzl’ after Austrian Josef Fritzl, who kept his daughter captive in an underground dungeon for 24 years, Trenneborg allegedly raped the woman before covering her face with the mask of an elderly woman, putting her into a wheelchair and driving her five hours away to his home.

Now, the victim – aged in her 30s – has spoken of her horrific ordeal.

“It felt like one long nightmare. When I woke up I had two needles stuck into my arm. He was sitting on a chair beside the bed,” she said, according to the Daily Mail.

“He told me that the door was the same as they have in bank vaults, that the walls were made of thick concrete and that no one would hear me scream how much I tried and that it is impossible to get out from there.

“He also said that if I was going to attack him and kill him, all I would have been left with was a stinking corpse. There was no way for me to get out of the bunker without his assistance.

“There was a small room beside the kitchen in the bunker. When I asked him what that was supposed to be in the future, he said that it would be his own torture chamber.

“He said it with a smile and I don’t know if he was joking.”

Julie told police Trenneborg intended to keep her locked up for years as his “girlfriend”, to “have sex two or three times a day, clean and cook”.

She claims Trenneborg said he was planning to bring another woman – either a celebrity or Julie’s mother – into the bunker once he had installed a shower with hot water and a few other things.

“He said that he wanted to bring another woman to the bunker,” she said.

“He was targeting some kind of celebrity. His plan was to dress as a plumber and knock on his victim’s door and then kidnap her.

“He asked me if my mum was as pretty as me. Then he said that perhaps my mum could be the other girl in the bunker. The thought of him bringing my mum to the bunker, scared the life out of me.”

During the six days he held Julie captive, Trenneborg took her blood and vaginal samples, testing them at his workplace to check whether she had STDs.

He also allegedly gave her birth control pills because he wanted to have unprotected sex with her without her falling pregnant.

But his evil plan unravelled when he went to Julie’s home to retrieve some of her belongings and discovered concerned notes from her loved ones.

He panicked and took Julie to police, forcing her to tell them she was unharmed and had not gone missing.

Police because suspicious of her story and, after being taken aside, she told them she was kidnaped and raped.

Trenneborg admitted drugging, kidnapping and holding his victim against her will. He admits having sex with the woman, but denies raping her.

His trial will begin next week.

*Not her real name. The victim cannot be identified.