Here's the website of this "secretive" Catholic apostolate.
Quoting from their website:
Opus Dei is a Catholic institution founded by St. Josemaría Escrivá. Its mission is to spread the message that work and the ordinary circumstances of life are occasions for growing closer to God, for serving others, and for improving society. Opus Dei complements the work of local churches by offering classes, talks, retreats and pastoral care that help people develop their personal spiritual life and apostolate.Gasp!
Proof that the Conspiracy is even better concealed than we thought! The fiends!
Opus Dei seems to have a wide range of practices, from the unremarkable to the totally bizarre. There are credible reports of Opus Dei members and groups engaging in things like self-flagellation to the point of major bleeding. Then again, I don't think anyone believes that Opus Dei member Antonin Scalia engages in such practices. The public face of Opus Dei disclaims any involvement in such things; the hard-core conspiracy theorists contend that the palatable public face is just to lure people into the "cult", and that the intention is to gradually pull as many people as possible into the extreme practices. The truth is probably that the whole spectrum exists within the many groups operating under the Opus Dei label, and that the extremists conceal their activities more to avoid having the Vatican publicly disavow their claim to be officially part of Opus Dei, than to deceive new members about the true nature of the organization.