Sometimes you don't realise you're falling for someone until it's too late.
For Suki and Zuko, having spent 3 of the nearly 4 years since Zuko's coronation side by side almost every day as bodyguard and liege, this is the exact position they find themselves in. To make things even more difficult, Suki still cares a great deal for Sokka, considering they're still together.
However, Sokka, too, deals with new feelings, unknown and confusing, beginning to sprout towards his closest friend, the greatest Earthbender of all time, Toph Beifong.
How will these two pairs, on their parallel journeys, deal with these new feelings as they make themselves ever more present?