From Water to Ice (A Rise of the Guardians and PJO/HOO Crossover)

It's been a year since the giant war and Percy Jackson is a happy as ever. (No trials of Apollo)
Leo came back with Calypso and all of the seven are alive.
During the final battle with Gaea Percy over exerted himself and his powers over water greatly weakened, so he can barely use them, but Percy couldn't care less as long as he got through high school.
He and Annabeth are living with his mom, Paul, and his 5 year old sister Cora.
That is until during winter break Percy drowns due to hypothermia in a frozen lake, even though his body was never found he was proclaimed dead.
Three years later Jack Frost is created and is told who he is by the the moon.
Will Percy/Jack figure out who he is with the guardians or will he never know?
Find out what happens after the guardians meet Jack and how he ends up back at camp half-blood.
If you have not seen Rise of the Guardians or read Heroes of Olympus I do not recommend reading.