The film is good and quite deep, despite the light, slightly exaggerated comedy presentation. The ending is quite specific, the unfinished film can not be called.
Spoiler:
Aliens have arrived. The earth was cleared of the remnants of humanity, as from slag, and a small part was evacuated. Why is this couple and baby among the survivors? Answering this question, you can understand the author’s position: which of the people is worth saving, and which is time for scrap.
My version is of those who still have something human: who managed to preserve love and strive to become better, truly, who, despite the wild fear, shields the loved one from the “poof” and saves the baby, despite the senselessness of this act in the context of saving their own skin. There is a comedy, but pay attention: they several times, risking themselves to save the lives of each other and the child.