After a fading rock star dies of a drug overdose in Canada, his strung-out widow (Maggie Cheung) leaves their little boy with his paternal grandfather (Nick Nolte), cleans up during a six-month prison term, then tries to reassemble her life in Paris. Cheung and director Olivier Assayas previously collaborated on Irma Vep (before they married and divorced); this 2004 French feature marks their creative reunion, but it’s a disappointment. Weak, self-absorbed, ill-tempered, and devoid of glamour even in her casual bisexuality, the protagonist is a systematic inversion of the hot star Cheung played in the earlier movie, and despite her skilled acting (which was honored at Cannes), she can’t make the woman very interesting in her own rightthe most compelling performance here is Nolte’s. With Jeanne Balibar, Don McKellar, and Beatrice Dalle. In English and subtitled French. R, 111 min. (JR)