under wraps

Under Wraps is the name of an album by the band Jethro Tull, released in 1984. The original 1984 release had 11 tracks, with "Astronomy," "Tundra," "Automotive Engineering," and "General Crossing" appearing on cassette only. Now the standard release carries all 15 tracks, and the 2005 enhanced CD also contains a QuickTime video for "Lap Of Luxury". Although controversial amongst Tull fans due to its 1980s electronic/synth-pop sound, guitarist Martin Barre has cited Under Wraps as his favourite Tull album. This is the only Jethro Tull album that features no live drummer at all.
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Adjective
1. kept secret; "the plan was kept carefully under wraps"
(synonym) under wraps(p)
(similar) covert

secret, not advertised, on the QT I know the name of the winner, but I have to keep it under wraps until tonight.

Synonyms and related words:
abstruse, arcane, beclouded, blind, buried, cabalistic, censored, classified, close, closed, clouded, concealed, covered, covert, cryptic, dark, eclipsed, enigmatic, esoteric, hermetic, hid, hidden, hush-hush, in a cloud, in a fog, in eclipse, in purdah, in the wings, incommunicado, latent, mysterious, obfuscated, obscure, obscured, occult, recondite, restricted, secluded, secluse, secret, sequestered, smothered, stifled, suppressed, top secret, ulterior, unbreatheable, under an eclipse, under cover, under house arrest, under security, underground, undisclosable, undisclosed, undivulgable, undivulged, unknown, unrevealable, unrevealed, unspoken, untellable, untold, unutterable, unuttered, unwhisperable, wrapped in clouds
  

NASCOSTO. SEGRETO