Taking place several months after the conclusion of the first season, it follows Madoka and her two alien best friends, Lan and Muginami who with the power of their magical mechas--the Vox--they try to persuade Lan and Muginami's older brothers Dizelmine and Villagilio (respectively) to stop warring with each other, and prevent an apocalypse that's somehow connected to the Vox.
And that's pretty much half of what I could give as a summary to the plot. The story of Rinne no Lagrange is a confusing one, in that it's a fantasy series where none of the fantasy elements are ever given explanation. What exactly are the Vox? Are they bad or good, and how are they related to the apocalypse? Why are the nations of De Metrio and Le Garite warring with each other? What is with those huge flower things in the sky? None of this is given a clear answer, and since these are the things which the main story revolves around, it causes the whole thing to fall apart.
And yet it's all tolerable to the point where it's actually rather enjoyable in a non-ironic way. Most of the characters themselves are well-written; I wouldn't exactly call them deep or anything, but they have likable personalities, and they're dramatic needs were believable and clearly expressed--even if the plot surrounding these dramatic needs was not. You may not understand why Madoka and the others are battling against the powers of darkness (or something), you still enjoy watching them do so because of how likable they are.
This in part is due to the slice-of-life qaulities of the first season, which allowed you to feel more attached to the characters. The first season also had the problem of infusing these qualities with the more dramatic parts of the story, which consequently made it hard to take certain scenes seriously. Although the straight-up slice-of-life scenes are toned down in Season 2, it still has the problem of having a light-hearted atmosphere when it would probably have done better if it could have taken itself more seriously.
It seems as if the writers put so much focus into the characters and slice-of-life elements, that they never bothered to put much thought into the actual plot. Nothing was really even presented as "questions"--all of the characters just went along with the flow of events as if they already knew the nature of the Vox, or why De Metro and Le Garite were warring.
Despite this, Season 2 still manages to have its share of emotional moments, which only get better as the series progresses. However, sometimes you'll be enchanted by one of these wonderfully presented scenes, only for some other aspect of the plot to ruin it--canceling out what could be seen as a redeeming quality. In fact, the plot pretty much cancels all of the good qualities that the show has to offer, no matter how enjoyable they might have on their own.
