It was supposed to be a routine thing. Stop Talon from destroying King's Row for the umpteenth time. Sweep the rest of the city for Talon threats, eliminate them as necessary. Unfortunately for pilot Hana Song and her mech D.Va, nothing about that night was routine. Talon was far better equipped and better prepared than ever before. No matter what Overwatch attempted, Talon was there and at least two steps ahead. After a long, drawn out battle, Talon was eventually routed and London was safe. Or so they had thought. Wounded previously in battle, Hana Song stumbled upon a final Talon gambit: Yank open a portal that lead to who knows where, get some evil to come through, and trash London for them. Song would have found it funny if it hadn't been so real. Left without any way to call for back up or further orders, Song charged in there alone with her damaged MEKA, D.Va. Things quickly go awry, and Song finds herself unable to escape the malfunctioning portal. Sucked into an alien world with three other agents of Overwatch, the four comrades soon come to the realization that this world might just be in as big of dire straits as earth is. With no way home as of yet and driven by the desire to aid those in need, Hana and her friends are determined to set things right before they leave.