Mariah plans her upcoming nuptials to billionaire James Packer and the launch of her first world tour in a decade simultaneously, which presents a difficult dilemma. Meanwhile, Mariah must race the clock to showtime and entrust the tour at the hands of her new tough manager, Stella.

Mariah continues touring; she tries to be the best mother to her twins; a disagreement erupts between performers; Mariah gets pulled into the middle.

Mariah must win back her audience when a time zone change goes unnoticed; former employees leak information about Stella to the press; Mariah's hairstylist makes a costly mistake; Stella must bring back Danielle, Mariah's former hairdresser.

Mariah makes special memories for her kids; Molly continues to please her tough boss, Stella; Tanaka lights a match.

Mariah spends more quality time with her road family; Tanaka struggles to keep his feelings platonic; Tanaka's moment becomes jeopardized when he suffers from an unexpected injury.

The loss of Prince leaves Mariah devastated moments before a Paris show; another dancer gets injured, Mariah starts to feel the need to simplify the show; Mariah's fiancé, James, comes to visit.