have one’s heart set on

Idiom: "(to) have one’s heart set on"

Definition:

to really want something

Examples:

1) Chris really had his heart set on getting a Nintendo Wii, but they were all sold out.

2) I’m studying really hard because I have my heart set on going to Stanford.

中文解释：http://www.youzienglish.com/main/idiom_of_the_day/to_have_ones_heart_set_on/cn/