When the biotechnology teacher Ms Gonzales lets Nigel have the use of one of her rooms in the hydroponics dome at H.I.V.E. he creates a new carnivorous species of plant by combining the genes of several different plant species.
The plant which he nicknames Violet develops a taste for blood and starts to become aggressive after she gets a taste of blood from Nigel's finger.
She later grows to an enormous height after tapping into a growth hormone pipe. Violet goes on a rampage, and is eventually destroyed by Otto.