Ty got sick with a cold from being stuck in the rain and his friends decide to help him feel better. But when D-Structs starts attacking the crater it's when everyone realizes that all TY really needed to get better was some rest and friendship.
The episode begins after a rainstorm. The DinoTrux were at the ore station for breakfast when Ton-Ton noticed that Ty hasn't even touched his food. Ty just said "I'm just not hungry. (yawns) I'll be in the garage." and headed into the garage. When the others decided to go into the garage they found Ty fast asleep. Waldo asked Ace to check Ty's temperature who discovered it was very high.