Bride of Light for the Guardian of Darkness

It seemed like just a few tasks - to replace a friend at the wedding ceremony as the Bride of Light! What could go wrong?
As it turned out, everything. An attack by dark creatures, a cunning conspiracy, a cantankerous ghost, a cult of a sinister goddess… And there's also a foreign groom nearby, - and it seems he is also quite eager to change the bride.
But will it be possible to overcome the darkness around and the darkness within?