Okay we start off in Crono's house, nothing to worry about now, just ask Crono's mom for 200g and.. fool around if you like :)
Now, go to Leene Square.
You meet Marle here, just pick up her pendant and give it back to her. She will join you.
Ask this boy by the fountain, and you learn that Lucca is making her "crazy invention". Then head north.
Well, Marle disappeared while testing Lucca's machine. Enter this Guardia Castle to find Marle.
Take this path to meet "Queen Leene".
You learn that Queen Leene has been kidnapped, and you have to rescue her. Head to Cathedral.
Defeat the monsters, then play that piano and a door opens on the right.
Grr....?? No way to go??
Worry not, the swtich is right there!!
Again play the piano then head to the back of this section.
Now a door appears, enter the door.
Soon, you will meet the first boss of the game! the Yakra!!(he sucks!!)
Now, go back to where Marle(fake Queen Leene) disappeared.
Head back to Truce Canyon, and Lucca shows you her invention--The Gate Key!!
Marle asked you to escort her
back to her castle.
Yea screw the juries, good luck avoiding execution.
You find yourself in jail, there're two ways you caan choose: 1. wait till Lucca comes to rescue you.(just wait there don't do anything) 2. fight your way out!! (If it's your first time, it's better to fight, because you need more levels for the second boss, which is kinda tough)