While on a planetary expedition, Lt. Scott is infected by a plant and he now has a fungus-like growth on his left arm. TJ has tried everything known to her but she cannot get the fungus to stop spreading. Col. Young refuses them permission to return to Destiny to prevent the spread of the unknown disease and they face the prospect of having to surgically remove Scott's arm. In his unconscious state, Scott imagines himself returning home to Cloverdale where he is to be married to Chloe. In his dream-like state, roles and identities have changed: Sgt. Greer is his best friend and is with him to act as his best man; Eli is Chloe's brother; Col. Young his father; TJ is a paramedic who treats him after he loses consciousness; and Dr. Rush is the Minister who will marry them.
—garykmcd