Når Cal våkner med en livstruende feber, blir Grace bekymret for at det er en bieffekt av hans eksperimentelle kreftbehandling, men Michaela og Ben mistenker at Cals tilstand har noe å gjøre med en mystisk passasjer fra flight 828.

While investigating a Calling, Michaela finds a mysterious stowaway. Ben clings tightly to his beliefs. Cal comes out of hiding to pursue a lead.

Hidden voices on the black box draw Saanvi in. Cal sneaks to see an apprehended Henry. During a podcast appearance, Ben seeks help.

Everyone is forced to adjust as Cal guards a secret, Eagan pursues his own mission, and Michaela uncovers a tragic murder.