When Joy, Sadness, Disgust, Anger, and Fear find themselves locked in the Vault, they both encounter Lance who welcomes them to their "eternal fate". Disgust reacts in awe to see Lance within, which Sadness replies to her that Lance himself is a video game character. Lance then narrates that he longs to be a hero with the darkness hunting his past, but not before the Deep Dark Secret appears in front of them. After Bloofy introduces the Dark Secret to the Emotions, Fear asks Bloofy of what is the secret, which Lance replies to Fear that he prefers to keep it private. Joy then asks Lance that a rogue emotion named "Anxiety" took over Riley's Headquarters, so she offers Lance to open the jar and help them save Riley.

After Bloofy talks to the viewers of how to help the Emotions get out of the jar in order to them to escape the Vault, Lance replies to him that he was banished to the Vault, along with Bloofy himself and the Dark Secret; Disgust fearfully reacts that Lance should never be forgotten just before Joy asks her of what was Lance's power move. Later during Lance's flashback of him facing Pugu during a video game that Riley and her friends are playing, Lance attempted to attack Pugu, but the latter knocked Lance out, resulting his opponent to win. Back in the present, Disgust asks Lance to help her friends escape, explaining that no one is worthless. Lance agrees to help break open the jar, but is unable to tumble it with his ability to roll, so Joy asks the Deep Dark Secret to help smash open the jar.

Upon doing so, Bloofy then asks Lance and the other survivors inside the Vault to get Pouchy's help; after Anger grabs a stick of dynamite that Pouchy has, the explosion blasts open the door leading the Emotions to escape the Vault. Lance thanks the Emotions for freeing him as he decides to leave to continue his destiny. Suddenly, a group of security guards rush towards Lance and the Emotions, planning to send them back to the Vault. Lance goes into a conversation with Disgust,