The album was released on April 3, 1987 in Canada. This is the first disc with CBS (future Sony), the first disc also to have different versions depending on the country of distribution.
There are also two French versions of this album, one released in 1988, and the other in 1992. This album features six standard tracks, with in addition, depending on the version, the songs "Partout je te vois" and "Délivre-moi" (1987, 1992), or Ma chambre"and "Ne partez pas sans moi" (1988).
"I sang for the first time the lyrics from Lolita in front of Rene, Celine tells, to provoke him. I wasn't looking at him, but I was sure that he was possessed with every words and that he was upset... It was strange, a kind of declaration of chaste and unchaste love. Then we kept silent for a long while. The message was direct."
(Note that Celine and Rene were not yet in love but their love was becoming clear.)
The music, by Aldo Nova, very physical and spectacular, very exacting too, has the advantage to exploit Celine's all voice.
During the Juno Awards (Canada), and to impress english canadian audience, Vito Luprano, CBS artistic director, offered to Celine to perform Have a Heart, the english version of Partout je te vois; the album Unison features this version.
On April 30, 1988, Celine won Eurovision competition in Dublin, Ireland, with the song Ne partez pas sans moi. Celine represented Switzerland for the competition.
On the same night, just before going to sleep, she dared to kiss Rene.