From April to July this year, Ms Jonnalyn Arcillas, 32, "performed" household chores, sometimes for as long as 15 hours a day, for "would-be employers" in Singapore said to be watching her via CCTV cameras.
She had left her home in Zamboanga city, in the south, for Manila, trusting in a promise by a family acquaintance that in three weeks she would be working as a maid in Singapore.
She was taken to a building south of the capital city, where she was told she would have to be prepped for her new job.
One floor of the building was used as sleeping quarters, where she was crammed with about 80 other "trainees", and another floor served as a "training facility".
There were CCTV cameras mounted all around both floors, their red LED lights like tiny, unblinking eyes watching her even as she slept.
When her "training" began, Ms Arcillas was told to surrender her mobile phone. She was also told to stay inside the building at all times, and that if she had to go out to shop, a guard would have to accompany her.
There was often not enough food for everyone, and she remembers days when she ironed clothes, did the laundry, cleaned rooms and cooked from 6am to 9pm as part of her "training". "Trainers", both men and women, berated her often.
When four months had passed and it became clear to her that she was never going to set foot in Singapore, Ms Arcillas asked to be released but was told she would have to pay everything her recruiter had spent on her.
She paid up and ran to the police.
Last month, agents from the Anti-Transnational Crimes Unit swooped down on the "training facility", arresting the Filipino couple running the place and 12 others, including Singaporean Yvonne Phua, 55, who police said was a "trainer" sent by PEM Maid Employment Agency in Singapore.
It was an unlicensed operation, the head of the police unit, Senior Superintendent John Guyguyon, said.
"PEM is a registered agency in Singapore, but here in the Philippines it is not," he said.
He said it was not illegal to provide board and lodging to women being trained and recruited for jobs abroad.
But the conditions that the women were subjected to broke the law, which he suggested was probably the reason those behind the operation did not bother to secure a licence in the first place.
Government regulations bar recruitment firms from taking live videos of applicants simulating domestic work, so they can be vetted by off-site employers, he said.
Senior Supt Guyguyon said it was the first time he came across such an operation.
"It's like Amazon," he said, referring to the American online retailer. "If the clients like what they see, they just order one, and the maid gets sent to them."
Recruitment industry consultant Emmanuel Geslani told The Straits Times that illegal recruitment of Filipinos for jobs as maids in Singapore is still thriving despite the many arrests, deployment bans and tighter regulations introduced in recent years.
Senior Supt Guyguyon added: "Money is easy with this racket."
The Philippines has about 1,000 licensed recruitment firms that handle the deployment of over 1.8 million migrant workers each year.
About two-thirds get sent to the Middle East. The rest head for Singapore, Hong Kong and China.
Illegal recruitment feeds on this ecosystem.
In 2012, there were three cases of illegal recruitment filed every day, according to the Philippine Institute for Government Studies, a think-tank.
An individual, group or company is considered breaking the law when they recruit workers for jobs overseas without a government licence.
Illegal recruiters act as middlemen for employment agencies abroad. They also supply applicants to licensed recruitment firms.
Illegal recruiters fly under the radar, so they can circumvent government regulations that limit the fees agencies both in the Philippines and abroad can charge to workers.
For instance, a woman applying for a job as a maid in Singapore does not have to pay for her plane ticket, training expense, work documents, medical check-ups and insurance, much less the commissions of her Philippine recruiter or the foreign agency that places her.
Her employer is supposed to cover all these expenses, which can run up to S$4,000.