Desc: Liekehtivä sydän: Martti Haavio - P. Mustapää: Directed by Eeva Vuorenpää. With Matti Haavio, Lauri Honko, Maija Larmola, Raija Majamaa. A documentary of a Finnish poet, folklorist and mythologist Martti Haavio, often known by his pen name P. Mustapää.