The Group Discover A Trolley Car by A Lake Where They Decide To Spend The Night Mikey Accidentally Awakens A Sea Dragon Digimon Named Seadramon By Burning His Tail Who Pulls The Island That The Trolley Car Sits On Into The Middle Of The Lake So Angewomon 2x Using Her Power Calm Down Seadramon Rescuing Mikey Then Seadramon Join Them