In the Nick of Time (2005)

Five strangers find themselves trapped in an elevator of a luxurious hotel, witnessing the death of a former government official. Just before he dies, he claims that he has been poisoned and urges the five strangers to seek out and expose his killers. They must solve the mystery, that started several years ago. The bond between them will grow strong, and maybe, in the end, they can discover that somehow their presence in the elevator at that particular moment, was more than "accidental"...