When a malfunction occurs aboard the luxury space cruise ship Avenue 5, it’s up to engineer Billie McEvoy to warn Captain Ryan Clark, Avenue 5 owner Herman Judd and his right-hand-woman Iris Kimura that the incident may have a cataclysmic knock-on effect. As Rav Mulcair manages the situation from mission control back on Earth, Matt Spencer, the head of customer relations, tries his best to calm frayed nerves on board, and persistent passenger Karen Kelly discovers the crew may know more than they’re letting on.
As Rav and her team meet with a NASA representative to plot a potential rescue mission, Ryan learns that Cyrus an engineer working in a hidden part of the ship, has a surprisingly optimistic theory about the ship’s future. Judd donates a lavish personal item to help commemorate a fallen crew member. Karen becomes a vocal advocate for passengers. Mia and Doug receive marital counselling from Matt.
With Avenue 5 staff slacking in their customer service, Ryan offers Karen the opportunity to channel her unique talent for speaking the passengers’ language. Judd outlines the plan for a rescue mission and tasks Iris with organizing a vigil on Earth to raise the money to fund it. Rav endures a barrage of messages from the ship and handles an unruly press conference.