You, a crew of the Heart Pirates, arrived on an island. But suddenly, you, your captain and the other crew saw Ain, the Modo Modo no mi (which can return people to their younger age) and turned your captain into a 5 year old kid, before running away from you guys

"Wha? Whaaa I'm hungry!" Law cried out. He now has the mentality of a kid so he probably don't remember much about being an adult like how he was supposed to be.