Not much information has been revealed about this episode. From the internet and from reliable sources, all we know that is this one will feature quite an extraordinary plot and viewers will be surprised.
Probability is that, Iris will confront Barry this time and we will get to know the real reason behind his weird behaviour with his allies. So, tune into CW when it releases. (Eagerly waiting for the teaser)
Barry continues to help Jesse with her training and when a new Meta-Human, Mirror Master, appears on the scene he lets her tag along with him. Mirror Master teamed up with his old partner Top and they were searching for Snart to even the score. Jesse who is still struggling to control her powers, quickly join the chase but defies one of the Barry’s order which results into disastrous consequences.