When Ellen and Jonathan leave for the weekend, Reilly and Aggie invite Miller and Fiona over for a night of games. The night's festivities are cut short, however, when Fiona's prized miniature horse comes down with colic. Working with Aunt Ellen over the phone, Miller is able to help Aggie save the life of the horse. By the end of the evening, the friends have settled down and are enjoying a game of cards when Reilly's mother calls from the states informing Reilly that he's coming home and was accepted at a boarding school.