Lightning and Mater arrive at Mato's wedding at Mater's childhood home, where Lightning discovers that Mater comes from a wealthy family and that Mato's fiancé is Mateo, the cousin of his protégée, Cruz Ramirez. Lightning confesses to Cruz that he's been uncomfortable with the trip due to his experiences. Meanwhile, Mater and Mato reunite, re-sparking their sibling rivalry until Cruz helps them reconcile. At the wedding, Mater makes a speech that allows Lightning to come to terms with his experiences, and he suggests returning to Radiator Springs by road instead of a plane as he planned. (thetvdb.com)