Who is that coming up from the wilderness,
leaning on her beloved?
Rarity is not whole. Her adventures have finally caught up to her, and after a daring rescue of her beloved Rainbow Dash, she finds herself at least temporarily crippled. Her doctors are baffled--raw magic poisoning of the magnitude she sustained is not exactly commonplace. But Rainbow is there for her, watching, worried, and hopeful. A Lady endures all things, after all, and Rarity is the epitome of a lady.
Sequel to Where the Sun is Silent, Catch For Us the Little Foxes, and Great Heart Will Not Be Denied. Knowledge of these is helpful, but not exactly required. The story is less about the continuity and more about Rarity and Dash.