Robin rediscovers a group of single girls who like to party; Ted pitches Barney a design for his company's headquarters.
Ben decides to set a good example for Emma by returning to high school to earn his diploma; former star athletes Sam and Riley argue over a prime location in the school's trophy case.
Ben and Riley try to get out of their unsatisfying relationships with more mature individuals; Bonnie and Tucker bet against Danny's hockey team when they stumble across insider information.
Cassie and Jenny struggle to dodge Donno's attacks; the kids attempt to save Bridger; a change is in the air when Ronald seemingly experiences a breakthrough; Jerrie receives an unwelcome visitor from her past.
Cassie grows suspicious of Max and decides to confront her; Jenny and Travis get together to talk in secret; Travis comes face to face with Ren and Donno who are determined to get answers out of him; Lindor pays Wolf a visit.