John is a farmer trying to optimize the yield of their crops by understanding the process of photosynthesis and how to cultivate plants to optimize their yield. John starts by standing in a field of various crops, including wheat, corn, tomatoes, lettuce and potatoes, with the midday sun streaming down on them. As the game begins, they meet Dr. Green, an expert on photosynthesis, who will introduce himself and offer suggestions and advice. John then has the opportunity to examine the crops, go inside the greenhouse. The greenhouse contains: crops, a water tap, a laboratory bench with apparatus to measure and analyze the pH levels of different solutions by showing the pH value on its display, a computer console that controls an automated irrigation system and that allows the precise amount of water supplied to the plants to be specified in the console. The objective of John is to optimize the yield of the crops by experimenting with different variables such as water supply soil types, light levels, and pH levels.