Holden and Fred deal with infiltrators on Tycho. Drummer’s past comes back to haunt her. Amos returns to Baltimore. Alex and Bobbie’s investigation on Mars leads to rogue soldiers.

The Rocinante chases an asteroid as it hurtles towards Earth.

The Homunculi are winning. Ed and Ling face a horrific enemy within the hellish expanse of Gluttony’s gut. In Central, Mustang can only watch as his loyal band of soldiers…