"Lila is trying to find her way in the world--to figure out her thing. Her talented sister, Parisa, and athletic best friend, Melanie, both seem to have found theirs... and Lila can't help feeling left behind. But just when she thinks she might have it in her school's new band program, the floor falls out from beneath Lila. The program may have its funding cut! Lila visits her local bank in an attempt to secure a loan for the band program. While she's there, she's shoved by a passing stranger. Before she can even complain, however, the man leaves the bank and disappears. At her feet, Lila sees a strange box. Inside rests an old key, with a message carved into the box: A simple clue for you who holds the key. Remember to unlock the door for Opportunity. It turns out the key is magical! After falling asleep with it in her room, Lila is awoken by the appearance of a strange glowing door, which knocks three times from the other side. Upon opening it, Lila is met with the strangest sight. A girl her age waltzes into her room and claims to be Lila's lucky day. The girl says she's been called by many names: Providence, Fortuna, Lady Luck, Opportunity... but Lila can call her Felise. Felise will stay with Lila for seven serendipitous days, during which Lila will be the luckiest person in the world! But the man who lost the key has not forgotten about it--or Lila. Having spent a fortune procuring the Key to Opportunity, he'll do everything in his power to get it back."--Provided by publisher.