Out of options, Cassian is recruited for a dangerous mission to infiltrate an Imperial garrison.
Plot[]
Rael takes Cassian to the planet Aldhani, asking him to join a sabotage mission there to provide backup. Cassian is reluctant but eventually agrees; Rael asks him to use a pseudonym among the rebels, and Cassian chooses 'Clem'. Vel, the rebel group's leader, introduces him to the rest of the group but keeps Rael's involvement a secret. They explain to Cassian that they plan on destroying an imperial garrison, a key supply hub for the Empire, by taking advantage of a rare natural phenomenon in Aldhani's sky.
Meanwhile on Coruscant, Rael, posing as an art dealer, meets with Senator Mon Mothma, and they discuss challenges in keeping their opposition to the Empire hidden. Karn visits his mother after being castigated and placed on leave.