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When Crane's mother visits the Valley of Peace, Crane asks his friends to help him keep a secret from her.
Crane's mom visits the Valley of Peace. Crane reveals to Po that his mom hates kung fu so he promised her that he would never have anything to do with it. Crane asks Po and the others to help him keep his secret from his mom.
The Furious Five are busy training with a new move that Shifu is teaching them. Tigress, Monkey, Mantis and Viper easily perform the move, and now it is Po and Crane's turn. Po begins to combo, but Crane, distracted, doesn't try and Po falls down the stairs. Shifu is upset at Crane, who then says he quits the Five and leaves, with everyone wondering what is happening.
Po goes to Mr. Ping's noodle shop and finds Crane wandering around in a panic. Po annoys Crane to the point he tells him why he has decided to leave because of his mother, who is visiting and tells Po about how she has heart palpitations when she sees kung fu. Since she hated travelling, he never thought that she would actually come and visit. Worse yet, he tells him that in his letters he is an inn owner, the Jade Palace is an inn and Shifu is a grumpy employee. Crane then hears his mother calling for him and tells Po to tell the others about the plan.
Shifu is busy meditating when figures crawl around the pillars. The Lin Kuei are attacking, and the Five (minus Crane) aid Shifu. Po comes in and after a short fight, the Lin Kuei retreat. Po tells them to follow Crane's plan. Crane shows his mother around the village, until she gets upset and takes off to see the inn. Crane is afraid the plan has failed, but is surprised to see that it has. Yan Fan is surprised also and teases Shifu, who gets angry and Po and Crane.
Somewhere outside the Valley of Peace, Heilang and the wolves decide to strike again to reclaim lost artifacts, the Shadow Crowns. They move towards the Jade Palace and bump into Yan Fan, who mistakes them as employees and asks for water. The wolves steal the Shadow Crowns and attack Shifu and the Furious Five. Yan Fan is shocked to see kung fu and begins to have palpitations but Crane tells her he's doing imaginary games. Po and the others play along, but the crowns allow the wolves to defeat them.
Heilang teases Crane, who then makes them visible by splattering something on them. He then destroys the crowns and defeats all of the wolves, which surprises Yan Fan. Crane is surprised to see that she doesn't have heart palpitations anymore, and she tells him that it's because she never thought he was that strong before. The next day, Yan Fan says goodbye to everyone, and still teases Shifu. Po and Crane are happy, but Shifu is upset and that the hotel idea was Po's, so as punishment he has him and Crane go up and down the Jade Palace stairs 100 times.
- Despite airing afterward, it is presumed that this episode chronologically takes place before the events in the episode "The Secret Museum of Kung Fu", as Po and the Furious Five did not recognize the Lin Kuei.
- The episode's title references a song written by Randy Newman called "Mama Told Me (Not To Come)" that was originally performed by Eric Burdon & The Animals and later covered by Three Dog Night.