Lorca assigns Burnham to study the creature from the Glenn to find a way to use its biology as a weapon. Starfleet orders Discovery to relieve the dilithium mining colony of Corvan II which has come under Klingon attack. Stamets is reluctant to make such a long jump using the spores, and when the drive is activated the ship nearly collides with a star. Commander Landry is sent to keep the research on track, and attempts to sedate the creature to cut off its claw, but it escapes and kills her. Burnham approaches the creature with a spore cannister and it remains calm. Noticing the creature's reaction to the jump and its symbiotic relationship to the spores, Stamets and Burnham transport the creature to Engineering, where it connects to the drive and calculates the navigation coordinates, allowing the ship to jump to Corvan and save the colony.
On T'Kuvma's flagship, Voq and L'Rell scavenge the dilithium processor from the Shenzhou. On their return, Klingon commander Kol has convinced Voq's crew to mutiny and exiles him to the Shenzhou to die. L'Rell transports aboard and tells him they can win the war themselves.