With Constantine obsessed with getting his powers back, he convinces Spooner to join him on the quest to find the Fountain of Imperium. After they find themselves at the end of the Spanish Civil War, Spooner makes an unexpected bond with someone she feels the need to protect them from everyone, including Constantine. Now that they have a special guest on board the Waverider, Nate, Zari, Behrad, Gary and Astra all work together but experience some growing pains along the way. Meanwhile, Sara and Lita are concerned about Rory's health, so they try to convince him to take it seriously.
