The Land Before Time IX: Journey to Big Water

The Land Before Time IX Journey to Big Water is a 2002 directtovideo animated adventure musical film and the ninth film in The Land Before Time series. It was produced and directed by Charles Grosvenor. This is also the last film to use the soundtrack composed by James Horner. During the year this was released, Universal brought back on DVD, for the first time, two of the previous Land Before Time films The Land Before Time II The Great Valley Adventure and The Land Before Time III The Time of the Great Giving.

After a period of harsh rain, the Great Valley is partially flooded and covered in debris. Littlefoot rushes to find his friends after the storm ends, but they are preoccupied Cera and her father are removing a large log from their nesting area, Ducky and Spike are relocating their nest with their family, and Petrie has gotten a cold. Littlefoot is bored and wishes intently for a brother, but eventually explores on his own and discovers a large area flooded by the rains. The adults advise their children to stay away, fearing creatures from the outside may have been washed into the Valley. However, Littlefoot returns and meets Mo, a playful young swimmer that had been caught in the floodwater.Littlefoot quickly strikes up a friendship with Mo, and describes him as his mud brother a pun on blood brother. His other friends are unsure of Mo initially, but also take to him. Mo explains that he is from the Big Water and he swam into the valley during the flooding. He confirms that he is alone, but soon after a sharptooh swimmer attacks the group. Littlefoot requests help from the adults to help Mo return home, but they refuse, not wanting to risk leaving the Great Valley to aid a strange outsider. A subsequent earthshake separates the children and Mo from the rest of the Great Valley, though also imprisons the sharptooth swimmer in an underwater cavern. Unable to return, they decide to deliver Mo home on their own. ........

Source: Wikipedia