From the summary provided at Apple movies:
Based on the best-selling novel by Laura Kasischke, Life Before Her Eyes is a dramatic thriller about Diana (Oscar-nominee Uma Thurman), a suburban wife and mother who begins to question her seemingly perfect lifeâ??and perhaps her sanityâ??on the 15th anniversary of a tragic high school shooting that took the life of her best friend. In flashbacks, Diana is a vibrant high schooler (Evan Rachel Wood of THIRTEEN and THE UPSIDE OF ANGER) who, with her shy best friend Maureen, plot typical teenage strategiesâ??cutting class, fantasizing about boysâ??and vow to leave their sleepy suburb at the first opportunity. The older Diana, however, is haunted by the increasingly strained relationship she had with Maureen as day of the school shooting approached. These memories disrupt the idyllic life sheâ??s now leading with her professor husband Paul and their young daughter Emma. As older Dianaâ??s life begins to unravel and younger Diana gets closer and closer to the fatal day, a deeper mystery slowly unravels.
Judging from the trailer, it looks like the movie will be intense, stylized, and dark — much like House of Sand and Fog.