Hikaru, Tainted by Evil

Hikaru, Thor, and their S.H.I.E.L.D. escort find out that the next base is below ground. As they head inside, Hikaru receives a call from Pepper, who assures him that Akira is fine. Before she has a chance to tell Hikaru about Falcon's fate, however, the older Akatsuki brother travels too far under ground and his phone looses the signal.

Synopsis excerpt via Kitsu.